Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
This spring is the origin of the brook.
这泉水是那条小河的源头。
Put your books down on the table.
在桌子上放下你的书。
The police were astounded when Mrs.Ramsay told them what she had done.
拉姆齐太太把她所做的事告诉了警察，警察听后大为吃惊。