各位老师，理解的对吗？谢谢，总觉得别扭

There are a variety of situations where human exploration has led to a requirement to breathe from a totally closed environment; the most challenging is in space vehicles. Other, more mundane, circumstances have helped to develop systems to facilitate this, and are still being researched with a view to undertaking long-term space missions.

人类在各种探索时，有时需要在完全封闭的环境中呼吸，最困难的是在航天器中呼吸。为帮助人类在航天器中呼吸，已研发了某些较类似宇宙的环境，为了执行长期的空间飞行任务，还在不断研发这种环境。

各位老师，理解的对吗？谢谢，总觉得别扭