Bacs
(bac 的复数) abbr. 二进制模拟转换（Binary-Analog Conversion）；（美国）波音飞机公司（Boeing Airplane Company）；英国飞机公司（British Aircraft Corporation）
🗣️ 情景例句
And there's no reason why you can't do it from your home.
而且也没有理由你不可以在家里做。
Do you have change for a twenty-dollar bill?
你付了一张20美元帐单了吗？
I had nearly reached the town, when the young man suddenly said, very slowly, Do you speak English?'
“你会讲英语吗？”