Polyfluorination
多氟化反应
🗣️ 情景例句
I don't see why you are kicking up such a fuss.
我不明白你为什么要这样小题大作。
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
If you want to be thinner and healthier, you have to eat less food--and you also have to take more exercise.
“如果你想瘦些、健康些，你就得少吃一点--你还得多运动。”