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
It was not until yesterday that I noticed it.
我一直到昨天才注意到它。
Would you care to see a movie tonight?
今晚你要不要去看电影？
Red Star over China
“《西行漫记》”。