Mdd
abbr. microgram per square decimeter per day 微克/分米/天（腐蚀速率单位）
🗣️ 情景例句
You know something, Ellen?
知道一件事吗， Ellen？
John could not decide when to leave.
约翰无法决定几时要出发。
Of course.You can pay a deposit of thirty pounds, and then fourteen pounds a month for three years.
当然可以。您可以先付30英镑定金，然后每月14镑，3年付清。