成体、幼仔的耳骨大小和形状都基本一样，表明耳骨的生长和发育与头骨的发育是非同步的。
There is no big difference between the ear bones of mature dolphins and newborn dolphins in size and shape, which indicates that the development of ear bones is non-synchronous as that of the sk…
这些是胎儿的耳骨。
让赖歇特感到吃惊的是，他发现哺乳类的两块耳骨与爬行类颚部的一些骨片相吻合。
He was astonished to find that two of the ear bones in mammals corresponded to pieces of the jaw in reptiles.
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