Bch
abbr. 广播信道（Broadcast Channel）
🗣️ 情景例句
If you're under twenty-one years of age ...
如果你还不到二十一岁……
But you have to pay 5% commission on this money exchange.
但兑换这笔外币，您得另外付5%的手续费。
I think you have the Wrong number.
我想你打错号码了。