Fluorocarbons
(fluorocarbon 的复数) [建] 碳氟化合物
🗣️ 情景例句
Yes, Richard.
说吧， Richard。
You have also made some readjustment in your import and export business, have you?
你们的进出口贸易也有一些调整，对吗？
If you think it is necessary.
如果你认为有这必要的话。