在富氧环境里起火的化学性质开始变化，注意到这一点是很重要的。
It is important to note that fire chemistry starts to change in oxygen-enriched environments.
试车结果表明，PFDH - 2绝热层可以对富氧环境下工作的发动机燃烧室实施有效热防护。
Results of subscale engine test show that the insulation (PFDH-2) can be used for heat protection of oxidizer rich solid rocket engine chamber.
提示平原富氧环境使世居高原田径径赛运动员心率减慢，耗氧、耗能减少，对机体产生有益的影响。
The norm of body fluid doesn't change greatly during plateau training, which implies that the plateau training influences a little on the athletics' body fluid.
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