Polytef
[化] 聚四氟乙烯
🗣️ 情景例句
After you.
请先走。
Newspapers are the world's mirrors.
报纸是世界之镜。
but we were afraid that the strength of the current would prevent its landing anywhere before it became exhausted.
但我们担心，洪水力量将使它上岸之前就筋疲力尽了。