Polyfluoroethylene
聚氟乙烯
🗣️ 情景例句
Don't worry. The traffic is very heavy at this hour.
别担心。这个时间交通很拥挤。
Thank you very much. We really had a good time.
非常感谢你。我确实玩得很痛快。
Sparks were emitted from small black boxes and red lamps flashed on and off angrily.
小黑盒子里迸出火花，红色灯泡发怒似地忽明忽暗。