Sdma
空分多址
🗣️ 情景例句
I've been invited to give a talk at the conference.
我已受邀在大会上发言。
I asked him to keep quiet, but he wouldn't.
我请他保持肃静，但是他不肯。
A fine rain began to fall on our heads and the temperature had dropped.
一阵小雨落到我们头上，气温开始下降了。