Diplexing
双工发送设备, 双工接受设备
🗣️ 情景例句
Lacks courtesy is ill-mannered.
不礼貌，举止不当。
What does she mean by canceling her performance?
她取消自己的演出是什么意思？
The problem now facing humanity is: What is going to be done with all this knowledge?
用这些知识去做什么？