Mdd
abbr. microgram per square decimeter per day 微克/分米/天（腐蚀速率单位）
🗣️ 情景例句
Sounds good. I'll be there at 7.
很好。我7点会到。
He who hath good health is young, and he is rich who owes nothing.
健康葆青春，无债即富有。
No, there isn't. The nearest is about 4 kilometres away. You'd better catch a bus.
不，附近没有。最近的离这大约4公里。你最好乘公共汽车去。