Pdu
[计] 协议数据单元
🗣️ 情景例句
Take care, and don't be a stranger.
保重，以后别见外。
I cannot hear the tape.
这卷录音带什么都听不到。
So I drove back to the town and began to retrace the route, taking frequent glances at the map.
于是我驾车返回小镇，重新按路线行驶。