lowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low body低底盘平板车

1. Atomic oxygen in a low earth orbit is very active in chemical reactions, and it can oxidate copper.
   低地球轨道的原子氧化学性能非常活泼，能使金属铜氧化。
2. The engine burns again for about 5 minutes to boost the astronauts out of their low earth orbit and on the way of the moon.
   引擎再度燃烧大约五分钟，将宇航员从低地球轨道推送到前往月球的路上去。