Dinitrofluorobene
二硝基氟苯
🗣️ 情景例句
In my opinion, winter in Beijing is not very cold.
我觉得北京的冬天不是特别冷。
If I have time tomorrow,I think I'll get a haircut.
如果我明天有时间，我认为我应该理发。
How did you decide that product was safe?
你怎样决定产品是安全的呢？