Dmk
[医][=demethylketene]脱甲基乙烯酮
🗣️ 情景例句
He graduated from medical school in 1960
他在一九六零年从医学院毕业，
They called us just as we were having dinner.
当我们正在吃晚饭，他们就打电话给了我们。
It is recounted of Thomas Carly1e that when he heard of the illness of his friend,
他听说朋友病了，