Dihydroxycoumarin
[医] 二羟基香豆素
🗣️ 情景例句
before the guests arrive.
在客人到达之前。
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
found a brother who was thought to have been killed twenty years before.
巴斯曼如何找到了据信已在20年前死去的兄弟的事。