Dinitrofluorobene
二硝基氟苯
🗣️ 情景例句
OK. Now, I have ... first ... a couple of questions here.
好， 现在，我有……第一……几个问题。
My fever is gone.
我的烧已经退了。
They don't often have a bad day this year.
他们今年的运气还不错。