Acknowledger
n. 认收开关；了望装置
🗣️ 情景例句
I think it's time for the wedding to begin.
我想是婚礼可以开始的时候了。
He falls down the stairs.
他从楼梯摔了下来。
I think you'd better fly somewhere in the west.
我认为你最好先飞到西部的一个地方。