Mdd
abbr. microgram per square decimeter per day 微克/分米/天（腐蚀速率单位）
🗣️ 情景例句
But before I can publish your work,
但在我出版你的书之前
It's a piece of cake.
这很容易。
I read a few lines, but I did not understand a word.
我读了几行，但一个字也不懂。