Polyfluorination
多氟化反应
🗣️ 情景例句
Well, I've thought a lot about which college,
嗯， 我为了上哪一所大学想了很多，
The computer is out of order.
这台计算机坏了。
I promise. Let me go home now. I am not well.
我答应。现在让我回家吧。我不舒服。