Polyfluorocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
Number 1 train to Van Cortlandt Park. Thank you.
一路车到Van Cortlandt公园。谢谢。
The more noble the more humble.
越高贵，越应谦逊。
I brought it here three days ago.
3天前。