Acknowledger
n. 认收开关；了望装置
🗣️ 情景例句
We're on the fifth floor.
我们在五楼。
My hobby is collecting books.
我的嗜好是收集书籍。
We would've called a taxi if Liz hadn't offered us a ride home.
假如李兹不送我们回家，我们就打的了。