Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
Sure. Would you please sign your name on the back, sir, with your passport number?
每问题。先生，请您在支票背后签上名字和护照号码。
Don't answer back.
不要顶嘴。
I am too tired to speak.
我累得说不出活来。