Explanatory model essay

Metaphor is a way to illustrate things by metaphor. For example, "bridge opening is not an ordinary semicircle, but like a bow." For example, it is a method that takes specific things as an example. For example, "this kind of bibliography records the literature of its specialized subject or discipline." If you want to find the ancient literature of China, you should use the Summary of Sikuquanshu or the Catalogue of Rare Books of Ancient Books in China.

Counting is a way to explain things with data. For example, "I don't know, this Tianhe River is flooded with more than 100000 stars, and it will take you1000 years to count on it."

Contrast, that is, a method of comparing another thing with another thing to illustrate its characteristics. For example, "When the Yongding River flooded, it was very powerful. In the past, the riverbanks on both sides of the river were often washed away, but nothing happened to this bridge, which shows its firmness. "