作为一名婴儿喂养、哺乳方面专家，我经常被问到如何恰当地瓶喂一名母乳宝宝。
Often, as infant feeding specialists, lactation consultants and other experts in the field of human lactation are asked how to properly bottle-feed a baby.
哺乳动物只含有球囊和椭圆囊两种耳石器官，而非哺乳动物中还存在另外一种耳石器官——瓶状囊。
The macula lagena is another otolithic organ in the inner ear of non-mammals, and the lagena of more advaced birds develops better than that of lower animals.
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