现在婴儿的骨骼几乎全部都硬化了，他的颅骨直到出生之后将仍保持柔韧，这让他适合通过产道。

While your baby's bones have mostly hardened by now, his skull will remain pliable until after birth to allow him to fit through the birth canal.

youdao

现在婴儿的骨骼几乎全部都硬化了，他的颅骨直到出生之后将仍保持柔韧，这让他适合通过产道。

While your baby's bones have mostly hardened by now, his skull will remain pliable until after birth to allow him to fit through the birth canal.

youdao