M-s
abbr. minerals separation 选矿; Monday through Saturday 周一到周六; master-slave (flip-flop) 主-从（触发器）; Material Service (division of General Dynamics) 物资服务部（普通力学分科）
🗣️ 情景例句
But?
但是什么？
It's really different from what I expected.
确实和我想象的不一样。
Most business letters around the world are written in English.
世界上大多数商务信函都是用英语写的。