Polytef
[化] 聚四氟乙烯
🗣️ 情景例句
I remember when I used to be a Girl Scout.
我记得我还是一名女童子军的时候。
Action is the proper fruit of knowledge.
行动是知识的巧果。
Yes, that's right! Where did you see it?
对，没错！你在哪见过吗？