Phenylenediamine
苯二胺
🗣️ 情景例句
What kind of people do you work with?
你最喜欢和哪类人合作？
Up to you.
随便你。
I don't have any small pads. I only have large one. Do you want a pad?
我没有小本的信纸，只有大本的。您要一本吗？