Since the start of the space age, more and more littering has occurred in orbits near Earth, often because the intentional discarding of lens caps, packing material, fuel tanks, and payload covers.
Since the start of the space age, more and more littering has occurred in orbits near Earth, often becausethe intentional discarding of lens caps, packing material, fuel tanks, and payload covers.
Amore and more littering has occurred in orbits near Earth, often because 分析A选项
Borbits near Earth have become more and more littered, often from 分析B选项
Corbits near Earth became littered more and more, often resulting from 分析C选项
Dthere have been more and more littering of orbits near Earth, often because of 分析D选项
Ethere had been littering more and more of orbits near Earth, often with 分析E选项