Foldbacks
(foldback 的复数) 返送（系统）, 监听（系统）
🗣️ 情景例句
it takes a little bit of money to run a campaign.
竞选活动需要花一些钱。
Thank you for your kindness.
谢谢你的好心。
He told me not to bring you anything.
他吩咐我不要给你带什么东西。