Fdma
频分多路,频分多址
🗣️ 情景例句
I'm sorry I missed him. I had to work late.
很抱歉我错过了他醒着的时候。我必须工作到很晚。
I know the boy whose father is a policeman.
我知道那个男孩的父亲是警察。
After we had landed, the plane was searched thoroughly.
我们降落之后，飞机被彻底搜查了一遍。