胎儿肺里的水,少的有六七十毫升,多的足有一二百毫升,真不是个小数目!可是孩子一出生,只要一吸气,这些水都不见了,它们跑到哪里去了?医学家一直在寻找答案。有些医学家说,胎儿从妈妈原来的“住处”(子宫)跑出来,必须经过又挤又窄的产道,正因为这么一挤,才把肺里的水挤掉了,即从口鼻中 The water in the fetal lungs is as little as six or seventy milliliters, and as many as one or two hundred milliliters are really not a small number! But when the children are born, as long as they inhale, these waters are gone. Where do they go? Medical scientists have been looking for answers. Some medical scientists said that the fetus had rushed out of her mother’s original “living place” (uterus) and had to go through a narrow and narrow birth canal. It was because of this squeeze that the water in the lungs was squeezed out, that is, from the nose and mouth.