我们知道,航天员进行出舱活动时,首先要在气闸舱内进行各种准备工作,其中一项是呼吸纯氧,以预防太空减压病的发生,那么,什么是太空减压病呢?在外界环境气压在从正常大气压降低过程中,人体减压过快,机体组织、体液中平时溶解的气体(主要是氮气)因过饱和而离析出 We know that when an astronaut performs an outbound activity, he must first prepare various kinds of preparations in the airlock. One of them is breathing pure oxygen to prevent the occurrence of space-based decompression sickness. So what is space-decompression sickness? In the external environment pressure in the process of reducing from normal atmospheric pressure, the body decompression too fast, the body tissue, body fluids usually dissolved gas (mainly nitrogen) due to supersaturation and isolated