Mdr
abbr. 日最低需要量（Minimum Daily Requirement）；存储数据寄存器（Memory Data Register）；多路数据记录器（Multichannel Data Recorder）
🗣️ 情景例句
There is not a shadow of a doubt that they did it.
毫无疑问，是他们干的。
I want to extend my warmest welcome to all of you.
热烈欢迎大家。
In Miss Gao's class there are forty-six students.
在高老师的班上有四十六个学生。