orbital debris

• 空间碎片

orbital debris的用法和样例：

例句

1. The issue of space debris is a big challenge to further expansion of space activities.
   空间碎片问题是人类进一步开展航天活动所面临的一个重大挑战。
2. They are concerned because space debris can puncture the space station walls and jam mechanisms.
   他们关心空间碎片可以穿透空间站墙壁堵塞机构。