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
That's it.
对啦
It's been a long time.
好久不见了。
True eccentrics never deliberately set out to draw attention to themselves.
真正古怪的人从不有意引人注意。