Foldbacks
(foldback 的复数) 返送（系统）, 监听（系统）
🗣️ 情景例句
He was left in charge of the shop while the manager was away.
经理不在时他负责这个商店。
I could only guess the number of people in the room.
我无法正确地猜测房间里面有多少人。
My car needs washing.
我的车需要洗一洗。