Fluorocarbon
[建] 碳氟化合物
🗣️ 情景例句
What's your opinion about this?
你的观点是什么？
I didn't read the whole paper, arts column.
我没有看到报纸的全部，我只是大概看了艺术版。
A moment later, the Class 4 runner fell and hurt his leg, but he quickly got up and went on running.
过了一会儿，4班的运动员摔倒了，伤了腿，但是他很快爬起来，继续往前跑。