evolution
n. /ˌev.əˈluː.ʃən/ B2
进化；演变
The gradual natural development of plants, animals, or ideas over time.
仙境例句
The Tortoise said that through evolution some fish slowly grew legs, but the Mock Turtle did not believe it.
老陆龟说，有些鱼经过进化慢慢长出了腿，可假海龟不信。