vestigial
vestigial 英 [veˈstɪdʒiəl] 美 [vɛˈstɪdʒiəl, -ˈstɪdʒəl]
adj. 退化的；残余的；发育不全的
名词复数:vestigials
- Vestigial describes an organ or body part that continues to exist without retaining its original function, such as our appendix.
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- adj. 退化的；残余的；发育不全的
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1. The wings of the chicken have become vestigial; it can no longer fly.
鸡的翅膀逐渐退化， 不会在空中飞行了。
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2. In On the Origin of Species, Charles Darwin used vestigial organs as evidence for evolution, and their presence has helped define and shape our phylogenetic trees.
在《物种起源》一书中，达尔文将退化的器官认定为进化的证据，它们的存在帮助我们定义和形成了人类的进化树。
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3. Because these structures can be traced back through the ancestors, they essentially serve as a marker of evolution; no organism can have a vestigial organ that hasn’t been found in its forefathers.
由于这些结构的出现可以追溯到各代祖先，所以它们可以作为进化的标志；没有一个生物体身上的退化器官是祖先没有的。
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