Dinitration
二硝化作用
🗣️ 情景例句
All right, let's get down to business.
好，我们来谈正事吧。
There'll be time for questions at the end.
最后会有时间发问的。
'The light is dim.Read the letter to me'.
“光线太暗，请给我读一下这封信。”