clearly visible during early development, also: the skeleton surrounding the inner ear or otic vesicle, composed of the prootic, opisthotic, exoccipital, and supraoccipital.
也可指是围住内
或小囊的骨骼，是
骨、后骨、外枕骨
枕骨所组成。
clearly visible during early development, also: the skeleton surrounding the inner ear or otic vesicle, composed of the prootic, opisthotic, exoccipital, and supraoccipital.
也可指是围住内或小囊的骨骼，是骨、后骨、外枕骨枕骨所组成。
声
：
例句、词性分类均
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