The network explanation of dolphins is that dolphins (cetaceans living in the sea) have the typical morphological characteristics of toothed whales: spindle-shaped body; A crescent-shaped breathing hole; Skull intussusception, maxillary expansion backward and overlapping frontal bone; Left cranial top asymmetry; Tapered or spiked teeth, etc. The most obvious differences between species are related to feeding organs, such as beak, upper and lower jaws and teeth. The length and size of beak and the number and size of teeth reflect the niche range occupied by different species. For example, the total number of teeth varies from about 10 (Richter dolphins) to 250 (long-nosed dolphins). The appearance also varies widely. Only a few species, such as killer whales and pilot whales, are significantly type II, while more species can be slightly type II in body size, shape, color and dorsal fin shape. Body size ranges from less than 1.5 meters (some species of dolphin) to more than 9 meters. Beaks range from very long (true Indian Ocean dolphin subspecies) to very short (white-beaked striped dolphins), and several genera (killer whales, pilot whales, killer whales, fake killer whales and melon whales) have no beaks at all. Most species of dorsal fin are sickle-shaped, and a few are triangular (some subspecies of long-nosed dolphins, male killer whales) or round (hershey dwarf dolphins). The bottom of the dorsal fin of a white dolphin. ) form thickened ridges or bulges, while exposed dolphins (Lissodelphisspp. ) There is no dorsal fin at all. Body color varies from black and white to complex black, white and gray spots. Dolphin is an aquatic mammal, closely related to whales and porpoises. It evolved in Miocene about 65438+ 1 100 million years ago, widely lived in shallow waters near the continental shelf, and was occasionally found in fresh water. Mainly feed on fish and mollusks. Dolphins constitute the Dolphinidae, which is the most diverse family of marine mammals. There are 37 species in the genus 17 in the world, and 8 species in China 13 genus/kloc-0. Dolphins have a friendly appearance and naughty personality, and have always been very popular in human culture. The phonetic notation is: ㄞˇㄊㄨㄣ _. Structure: sea (left and right structure) dolphin (left and right structure). The pinyin is hit ú n. The part of speech is: noun.
What is the specific explanation of dolphins? We will introduce you through the following aspects:
I. Text Description Click here to view the details of the plan.
Dolphin h m 4 it ú n (1) In some small toothed whales of Kingfisher family, some snouts extend into beaks, and the cervical vertebrae are partially fused.
Second, the citation interpretation
Mammals. Living in the ocean. It is about two meters long and spindle-shaped. The nose grows on the top of the head, the back is blue and black, there are dorsal fins, the abdomen is white, and the forelimbs become fins. The sulcus gyrus of the brain is very complicated, and you can learn many complicated movements and have a good memory. Meat can be eaten, and oil and skin can be used as industrial raw materials.
Third, the national language dictionary.
Animal name. Mammals, Cetaceans, Dolphinidae. It is about 2 meters long, with a small head, a pointed mouth, long nostrils on the top of the head, a blue-black back, a white abdomen and flippers on its forelimbs, which can be used to keep balance. Feed on fish, shrimp and squid. He can learn complex movements and has a good memory. He is a very clever animal. English Dolphin German Delfine(S, Bio)_ French Dove
Poems about dolphins
This is a constant temptation. How many sailors were killed? The stone dike prevented the slope from sliding into the seabed. Dolphins fall across the stars, and some dolphins vomit blood.
Words about dolphins
dolphin
Idioms about dolphins
Wearing chickens and dolphins under the sea? Dolphins are dying, their hoofs are pounding, the sea is eating and drinking, and dolphins and fish are barren.
Words about dolphins
We mourn dolphins, wearing chickens, wearing dolphin hooves, breathing dolphins, fish, chickens, dolphins, cows, dolphins, dolphins, dolphins, dolphins, dolphins.
Sentences about dolphins
1, he has the IQ of dolphins, the appearance of dolphins and the trademark dolphin sound.
On Sunday, my mother took me to the park. There are my favorite dolphins, my favorite penguins and my favorite polar bears in the park.
3. They have a sweet kitten-like nose, big black eyes and flippers that feel silly, which makes people wonder if they were stuffed into a soft and lovely balloon full of fat by a big dolphin, a kitten and a calf.
The dolphins in the aquarium fly in the air for a while, dive into the water for a while, and climb to the water bank for a while.
The teacher told us that dolphins are viviparous animals.
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