in the process of (doing something or happening); while (doing)[cedict]
绕
ràoㄖㄠˋ
to go around; to wind (around); to orbit[cedict]
地球
dì qiúㄉㄧˋ ㄑㄧㄡˊ
the Earth; planet[cedict]
轨道
guǐ dàoㄍㄨㄟˇ ㄉㄠˋ
orbit; railway or tram line; fig. conventional way of thinking[cedict]
上
shàngㄕㄤˋ
on; on top; upon; first (of two parts); previous or last (week etc); upper; higher; above; previous; to climb; to go into; above; to go up; to attend (class or university); third tone of putonghua[cedict]