例句與造句

1. When the bodies move in the upper ionosphere , there exist series of complex non - steady interactions
   空間飛行體在外大氣層運(yùn)動(dòng)時(shí)，和周圍等離子體之間存在著復(fù)雜的非穩(wěn)態(tài)相互作用。
2. It's difficult to find upper ionosphere in a sentence. 用upper ionosphere造句挺難的