Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
Are you sick?
你病了吗？
His career opportunities suddenly looked brighter.
他似乎突然又有希望飞黄腾达了。
When they objected, they were killed.
他们反抗时就被杀害。