人类对呼吸生理的研究还极其浮浅，但是，都知道时刻保持呼吸。

来源: 大江川于 2014-12-08 09:42:51 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.