In study, work and even life, everyone has used comments. Comments can effectively guide the person being evaluated towards the ideal goal. So have you really understood the reviews? The following is an explanatory text with comments that I compiled for you. You are welcome to read it. I hope you will like it. Explanatory text with comments 1
The Venus flytrap is a representative carnivorous plant. The stem is about 20-30 cm. It is a type of vascular plant and a popular carnivorous plant. It has complete roots, stems, leaves, flowers and seeds. Its leaves grow directly from the roots. The leaves are composed of a petiole and a wing-shaped insect trap on it. The insect trap has burrs on its sides. There are three pairs of sensory hairs inside the insect trap. If an insect touches these sensory hairs, the Venus flytrap will quickly open and close quickly. It's like opening a bloody mouth. The speed at which the Venus flytrap captures prey is approximately between 0.1 and 0.5 seconds.
After the Venus flytrap catches the bugs, the trap of the Venus flytrap will not be opened for a period of time in order to digest the bugs. 7 to 10 days, but if you touch its sensory hairs with your finger or pencil, it will turn on again in about 20 minutes. The number of times the insect trap on a leaf can be opened and closed is only 2 to 3 times (6 to 7 times without food).
The Venus flytrap has a very poor memory. There are two situations when it closes the insect trap. If two or more sensory hairs are touched at the same time or one sensory hair is touched more than twice, it is touched twice. If the time interval exceeds 49 seconds, the insect trap will not close. The sensory hairs of the Venus flytrap must be touched twice in a row before it will close. The characteristics of the insect trap are to distinguish between being touched by wind or fallen leaves.
Although the Venus flytrap is very fast, the plant that is much faster than it is the sableweed. The speed it captures is 100 times that of it, which shows that there are people outside the world and there is a sky outside the world.
Comments: This article uses a logical sequence to explain the Venus flytrap in detail, and is highly professional. Use more explanation methods such as listing numbers, defining definitions, and making explanations. However, the language is not vivid enough. It is recommended to use more metaphors to attract readers' attention. Explanatory essay with comments 2
The characteristics of triangles play a very important role in our lives.
Although the current house is very high, it is very stable. Although the construction workers share the credit and the bricks and tiles on the roof share, the more important credit belongs to the triangle. Triangles have a strong effect, so you will find a triangle in the "herringbone" part of the side of the house, and there are two triangles in the cross section of the slab foundation of the house. This makes the house more stable and less likely to deform and collapse. Triangles not only stabilize the house, but also have other functions. For example, smart people use the principle of the two sides of the triangle extending downward to design the roof into a high ridge and low eaves, and cover it with tiles. It has the function of drainage, making the house safer, neater and cleaner.
The same is true for opening windows. The principle of triangular fixation is used. Two fulcrums are fixed on the wall or window frame to become axes, and a handle or button is installed on one point on the other side to make it open and close freely and safely. Beautiful, it brings convenience and ease to our lives.
Cabinets are one of the indispensable pieces of furniture in our homes now. It is convenient, safe, labor-saving, and can put a lot of things in it. This is also due to the triangle. Skilled craftsmen drove triangular wedges into the tenons of the cabinet frame, making the cabinet stand as stable as a rock. The triangular sides of some cabinets in the Modern Living Center can be shortened or extended freely, which allows the cabinet to be divided into several layers, making it faster and easier.
Have you ever observed the computers we often use? Have you noticed that the corners of your computer screen are also triangles? It’s the triangle that keeps the screen from creasing and tearing, making it clearer. It is precisely because of the triangle that we can easily find information online, play games online happily, and find friends online happily...
Have you discovered it? There are also four triangles on the book cover. It allows us to read books, makes them less likely to be torn, and enables us to learn more knowledge.
The triangle holds the sheets of paper together securely and protects the book better. Isn’t the triangle very useful?
Yes. Not only do triangles appear inside and outside the house, in windows, cabinets, computers, and in writing, but they also appear in many places. For example: on the door, on the table, on the bicycle, on the box, etc. Not only that, the triangle also exerts its greatest ability-fixability in every corner of life.
The fixity of triangles plays many and indelible roles in life, making us more convenient, relaxed, and safe...
Comments: This explanatory article introduces us to the application of triangles in real life. The explanation of this article is in a reasonable order. First, it will be summarized that triangles play a very important role in our lives, and then the role of triangles in houses, windows, cabinets, computers, book covers, etc. will be explained respectively. Finally, the summary will be discussed at the end of the article. The description language is plain and accurate. Explanatory text with comments 3
Dogs were domesticated from gray wolves in early humans. The domestication time ranged from 40,000 to 15,000 years ago. They are the earliest animals domesticated by humans. According to statistics, there are more than 1,400 dog breeds in the world, of which more than 500 are classified. There are about 240 kinds of famous dogs in the world. A large number of recent genetic studies have shown that there are about 450 existing species of dogs.
The dog’s facial features are as straight as a human’s, and its limbs are even stronger. They walked, swaying, and were extremely happy. Under normal circumstances, the length of a dog is about eight decimeters, and its weight does not exceed 35 kilograms...
Dogs are flexible by nature and are a lovable animal. There is almost no dog in the world that is demented, and there is no dog that doesn't like to eat or play. Not only that, the dog's reaction is also very agile. When seeing the appearance of mice, insects and ants, the dog will show its own ability and quickly catch the "prey" it is watching; within the dog's sight, almost no "prey" can escape its "hand" Heart".
Dogs don’t eat much, but they are very picky. Dogs eat about one-third of what humans eat in a day. They only eat fish, meat or other bones. They don’t like to eat most vegetables and fruits...
The intelligence of dogs is lower than that of lower animals. It is also extraordinary in the world and is one-quarter of the intelligence of higher animals - "human beings". Dogs that have been artificially trained can do many difficult actions: catching small objects dropped from higher altitudes with extreme accuracy at low altitudes; standing on tiptoe with one foot, holding human hands with both hands, as if dealing with humans...
Comments: This explanatory article takes dogs as the object of explanation and explains the "dog" from several aspects: "domestication history", "appearance", "nature" and "eating capacity". Use logical order to show that the order is reasonable. The use of explanation methods such as listing data, making comparisons, and making metaphors reflects the cuteness of dogs. But the "loyalty" in the title is not reflected much in the text. Explanatory text with comments 4
My name is table salt, which is a white crystal that is very beautiful. I also have a chemical name called sodium chloride. Human beings like to be friends with me because I am them. It is an indispensable substance in life. It tastes salty. This is because its composition contains sodium ions. It is not only a condiment in people’s kitchens, but also plays a role in maintaining normal osmotic pressure and neuromuscular activity of the human body. etc. all play a very important role, but there are always many people who use me too much when cooking, probably because they like me too much. As a result, many people suffer from hypertension. This is not what I want to see. , so here I want to remind everyone to "scientifically reduce salt and maintain healthy blood pressure"!
The relationship between me and high blood pressure has attracted more and more attention. On October 8 this year, my country’s 12th “National Hypertension Day” set the theme of “Salt and High Blood Pressure.” It made me famous all of a sudden, but I don’t want to be famous for my high blood pressure. I hope that everyone can use me scientifically and rationally, so that I can truly become a good friend of mankind.
Human beings have spent a lot of effort on the relationship between me and blood pressure. They have conducted a large number of animal experiments, epidemiological surveys and clinical studies, and have basically confirmed that I am an important susceptibility factor to hypertension. . The reason why excessive salt intake can lead to high blood pressure may be that it increases peripheral vascular resistance by increasing sympathetic tone, thereby increasing blood pressure. Hypertension often causes complications of the heart, brain, kidneys and other organs, seriously endangering human health. Therefore, the guidelines for the prevention and treatment of hypertension issued by various countries around the world include salt restriction as one of the important measures for the prevention and treatment of hypertension. The World Health Organization recommends that the daily salt intake per person should be less than 6 grams. Research shows that humans’ salt intake is directly proportional to high blood pressure. That is, the more salt a human body consumes, the higher its blood pressure level. For every 1 gram increase in daily salt intake, the average blood pressure rises by 2 mm Hg, and the low blood pressure rises by 1 .7 mm Hg. The average daily salt intake per person in northern Japan is as high as 30 grams. As a result, the incidence of hypertension and stroke is significantly higher than the world average. It is known as the "Kingdom of Hypertension". However, the salt intake in a certain island in Jamaica and Guizhou in my country is very high. If it is less, hypertension will not occur. People in northern my country have a greater preference for me, which also results in the trend of high blood pressure in the north and low in the south, which also explains the relationship between me and hypertension.
Scientific salt reduction is definitely beneficial to your health. A low-salt diet is also one of the basic treatments for patients with hypertension. Clinical data shows that in early stages of hypertension or mild hypertension, simple salt restriction may return blood pressure to normal. It is also beneficial for patients with moderate hypertension to limit salt intake, which can increase the effect of antihypertensive drugs and reduce the dosage of antihypertensive drugs. This not only reduces the possible side effects of using large amounts of antihypertensive drugs, but also reduces medical expenses.
My intake mainly comes from three aspects, one is the sodium content of the food itself, the other is the soy sauce or salt added during cooking, and the third is the preservative, coloring and other processes during food processing. And the added 'salt. Daily salt reduction is mainly to control the amount of salt used in cooking and on the table. For example, a family of three cannot use more than 250 grams of salt per month, which means that a small spoonful of salt (about 3 grams) is allowed every day. However, some people always feel that too little salt is used, and the food is bland and tasteless, and they have no appetite. In fact, the physiological requirement of salt is two grams per day. My excessive preference for me is an acquired bad eating habit. In addition, you should try to eat less foods with high salt content such as pickled products, animal offal, clams, spinach, etc. A high-potassium and high-calcium diet may reduce the incidence of hypertension. For good health, everyone can eat more foods rich in potassium, such as kelp, seaweed, fungus, yams, bananas, potatoes, fish, tomatoes, etc.
In short, I really don’t want to be blamed for “high blood pressure” all the time. I hope everyone can start from themselves, scientifically reduce salt, and effectively prevent and control high blood pressure. This will not only save resources, but also provide Bring health to you and your family!
Comments: This expository article adopts anthropomorphic techniques, the language is vivid, specific and accurate, and humorous. It uses a variety of explanation methods such as explanation, number listing, comparison, and examples to introduce salt to readers. It is related to human hypertension and we are encouraged to reduce salt scientifically. Explanatory text with comments 5
China’s traditional culture includes candied haws, ancient Chinese calligraphy, exquisite paper-cutting, and lively dragon and lion dances... What I like most is the ancient Chinese tea culture.
Do you know the history of tea? Tea was first used as food by people. Especially in primitive societies where supplies were scarce, tea was a way to satisfy hunger. Later, with the development of human civilization, tea drinking gradually became a custom, and even a tea drinking culture was formed in some areas. After tea was consumed, its medicinal effects were gradually discovered and understood by people, and tea was subsequently transformed into a good way to maintain health and cure diseases. In the process of drinking tea and using tea as medicine, people gradually discovered that tea has very weak medicinal properties, but it has a certain stimulant effect, so tea began to be transformed into a beverage. It was not until the Han Dynasty that drinking tea became a new trend, penetrating into all classes of society.
The period before the Three Kingdoms was the enlightenment of tea culture, the Jin Dynasty and the Northern and Southern Dynasties was the budding period of tea culture, the Tang Dynasty was the prosperous period of tea culture, the Song Dynasty was the flourishing period of tea culture, the Liao, Jin and Yuan dynasties were the return to originality of tea culture, and the Ming and Qing Dynasties were The popularization period of tea culture, modern times is the development period of tea culture.
Chinese tea has six categories: red, green, green, yellow, black and white, with more than 2,000 varieties. Different teas have different origins and different cultures. As long as you experience it carefully and read more, you can get more knowledge about ancient Chinese tea culture.
Comments This article starts with a title, which introduces us to the author’s “favorite tea culture” and the history of tea. It introduced in detail that "Chinese tea has six categories and two thousand varieties of red, green, green, yellow, black and white". The structure is clear and reasonable, making it easy to understand. Explanatory text with comments 6
The cactus is a unique tropical plant with very tenacious vitality.
The potted cactus’s indomitable character is very surprising. It doesn’t care whether there is water or no water, whether it’s hot or cold. Its green body has palm-shaped stems covered with hard thorns. It keeps growing upward, like a stack of Arhats. A "green little palm" grows out of a "green palm", which makes people think a lot. Wherever it grows, it stands vigorously in this posture. In the hot and dry summer, other potted plants have lowered their heads, but the cactus raised its head like a warrior, looking at the blue sky; in the bitterly cold winter, other potted plants have already been brought indoors by their owners, But the cactus still withstood the wind and frost and was not afraid of the surrounding environment. It has never been particular about it. As soon as it takes root, it seems to be saying: "This place is great, let's grow here!" The immortal is covered with hard thorns, and any wild beast will stop immediately when it sees it. When pests try to eat it, its body is always riddled with holes. A piece of green cactus broke to the ground. Everyone thought it was dead. No, you are wrong if you think so. It used the nutrients from its body to grow roots and cultivated a youthful little cactus. This is the real " Take root." Who can compare with its tenacious vitality? This seemingly ordinary plant, who would have expected that it would grow beautiful little flowers, just like the colorful tassels on a warrior's helmet.
The cactus is a tropical plant shaped like a palm, hence the name cactus. It is not afraid of the scorching heat, even if the temperature is as high as 40 degrees Celsius, it can survive without drinking water for several days. In this way, it withstands the test of the scorching sun day by day, month by month, and year by year, and grows happily. People should also have this kind of indomitable spirit. No matter in good times or bad times, they should live and work with a strong will.
Cactus is also a good medicine. It can help people when they are sick. For example, if you suffer from mumps, you only need to pound it into paste with stones and apply it to the cheeks, and you will be cured quickly.
Cactuses do not have flowers that make people envious at first sight, nor do they have colorful bodies. Its whole body is covered with needles, which makes people feel a chill when they see it. Its noble quality of selfless dedication is so admirable.
Comment This explanatory article introduces us to the cactus, its appearance and its tenacious vitality. He has very low environmental requirements and can take root on the ground. This composition uses contrasting techniques to compare cactus with other potted plants, which further highlights the tenacity of cactus. Explanatory text with comments 7
As we all know, China is a country with a long history and rich culture. In the long history, people have left behind many beautiful legends, touching stories, various customs and habits, and Colorful national art.
The twelve zodiac animals are one of the traditional cultures of our country. They are closely connected with our lives. Today I will introduce to you some relevant knowledge in this area. It is said that the ranking of the twelve zodiac signs is as follows: Legend has it that one year, the Jade Emperor wanted to select the twelve zodiac signs on the ninth day of the first lunar month. At night, the sleepy old cat asked the mouse to wake it up in the morning, and if it didn't wake up, it would eat it. But in the early morning of the ninth day of the first lunar month, the mouse quietly set out alone. The mouse couldn't swim, but it met a river. It sneaked into the ear of the cow and successfully crossed the river.
When the cow was about to enter the door, the mouse jumped out of the cow's ears and jumped in front of the Jade Emperor. As a result, the mouse won the first place, followed by ox, tiger, rabbit, dragon, snake, horse, sheep, monkey, chicken, dog and pig. Everyone has a zodiac sign, and our zodiac signs are determined based on the order of the twelve zodiac signs.
The hard-working and intelligent working people also made various works of art based on the shapes of the twelve zodiac animals. There are exquisite stamps, shining silver coins, ancient gold coins, exquisite pendants, beautiful embroidery, various paper-cuts, strange clay sculptures and all kinds of strange fabrics... It is really exquisite and dizzying.
Look, isn’t our national culture colorful? If you are interested, you can also look for relevant information and share it with us.
Comment: This is an explanatory article about the origin of the twelve zodiac animals. The young author uses a variety of explanation methods, especially the citation of appropriate events and literature materials, which is not only convincing, but also can effectively increase people's knowledge. The order of instructions is also very well grasped, clear and organized.