Unicast
[计] 单一传播
🗣️ 情景例句
No.
不。
If you work in a factory,you usually have to punch a clock.
如果你在一个工厂里工作，你通常必须打卡。
We're going to leave at about seven thirty next Monday morning.
我们打算下星期一早上7：30 左右出发。