Diarylamine
[機] 二芳香基氨
??? 情景例句
No. I'm from Shanghai.
不是，我是從上海來的。
How did you sign the letter?Did you write, sincerely yours?
你怎么簽名信的?你寫了"真誠地你的"？
You're so careless.
你真粗心。