[简答题]Translate the following sentence into Chinese. It's not particularly proper to use radio communication unless on certain wave lengths that are absorbed by the atmosphere.
正确答案：
除非用某些能被大气层吸收的特定波长，否则在太空轨道站用无线电进行通讯并不怎么特别合适。
题目解析
考点：radio communication 无线电通信；certain wave length特定波长；be absorbed by 被···吸收。
句子结构：考察It's not···unless···句型，意为除非·····否则······。that are absorbed by the atmosphere为定语从句修饰certain wave lengths。
