In the field of manned spaceflight, extravehicular spacesuit is the essential equipment in extravehicularactivity (EVA).
在载人航天领域，舱外航天服是航天员进行出舱活动的必备装备。
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During this mission, Leonov becomes the first person to leave the confines of an orbiting spacecraft and perform an EXTRAVEHICULARACTIVITY (EVA).
在这次任务中，列奥·诺夫成为离开轨道宇宙飞船的区域而进行运载工具外活动(eva)的第一人。
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EVA spacesuit not only provides life support for astronaut, but also should have a high activity performance. So the astronaut can finish all kinds of extravehicular work. It is an ergonomics problem.