Backchannel
（传递消息的）秘密渠道, 特殊途径
🗣️ 情景例句
I can't wait to see my old pal Charley Rafer.
我真想早点见到老朋友Charley Rafer。
How do you spend your leisure time?
你怎样打发业余时间？
After gazing at the display for several minutes, Mr. Taylor went back into his shop.
泰勒先生站在橱窗外凝神欣赏了几分钟就回到了店里。