One striking example of an atavism is the human coccyx, or tailbone, which is a relic of the mammalian tail.
关于返祖的一个有力例证就是人类的尾骨，它是哺乳动物尾巴的遗留物。
Below the sacrum is the coccyx, or tailbone, which consists of several small bones.
在骶骨下面是尾骨，或尾巴骨，其中包含几个小骨头。
Below the sacrum is the coccyx, or tailbone, which consists of several small bones.
在骶骨下面是尾骨，或尾巴骨，其中包含几个小骨头。
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