Mdd
abbr. microgram per square decimeter per day 微克/分米/天（腐蚀速率单位）
🗣️ 情景例句
I'd like you to meet Audrey and her mother, Mrs. Cooper.
我来向你介绍， Audrey和她母亲 Cooper太太。
When the heart is full,, the tongue will speak.
胸有成竹，口若悬河。
Do you remember the first time we met?
你还记得我们第一次见面的情况吗？