Foldbacks
(foldback 的复数) 返送（系统）, 监听（系统）
🗣️ 情景例句
Could you tell me what's in this?
您能告诉我这里面是什么吗？
What are you doing next week?
下周你干什么？
Suddenly, they heard a voice behind them.
突然他们听到身后有声音。