Backchannel
（传递消息的）秘密渠道, 特殊途径
🗣️ 情景例句
If we're all prepared to recycle paper, thousands of trees could be saved every day.
如果纸能被循环利用，那么每天千千万万的树木就可得以挽救。
Nothing is impossible to willing mind (or heart).
有志者事竟成。
Not really.
不会吧？