Bch
abbr. 广播信道（Broadcast Channel）
🗣️ 情景例句
Let's go to see a show.
我们一起去看场电影吧。
Full details regarding packing and marking must be strictly observed.
请严格遵守包装及商标的细则。
But we still have a problem.
不过我们还是有问题呀。