Mdm
abbr. 工程数据管理（Master Data Management）；维修诊断手册（Maintenance Diagnostic Manual）
🗣️ 情景例句
You're most welcome.
不用客气。
Thoroughly to teach another is the best way to learn for yourself.
教学相长。
There are four seasons in the year here--spring, summer, autumn and winter.
这儿一年有四季--春、夏、秋、冬。