Backchannel
（传递消息的）秘密渠道, 特殊途径
🗣️ 情景例句
I think it's about time we got going.
我想差不多是告辞的时候了。
I only regret that I have but one life to give for my country.
我抱憾的是，只有一次生命能献给祖国。
No, not that one.The big one.
不，不是那把。是那把大的。