Backchannel
（传递消息的）秘密渠道, 特殊途径
🗣️ 情景例句
Win a few, lose a few. that's life.
有得也有失，生活就是如此。
I won't buy you story.
我不信你那一套。
And when do you take your next exams?
还有，你什么时候参加下次考试？