atavisms'ætəvɪzəmCOCA¹⁵¹⁹⁷⁸ 基本例句 n.返祖现象;隔代遗传原型atavism的复数 Similar in concept to vestigial structures are atavisms, which are the reappearance of a structure or trait that isn’t found in the immediate ancestors. 跟退化结构相似的概念还有返祖现象,它的意思是生物体身上重新出现直系祖先没有的结构或特征。 yeeyan