Dimethylbenzidine
二甲基联苯胺, 联甲苯胺
🗣️ 情景例句
The guests are waiting.
客人们正等着呢。
Have I made myself clear?
我讲明白了吗？
With a smile the man from downstairs said: I'm sorry to trouble you, comrade.
“对不起，打扰你了，同志。”