Fluoropolymer
n. [化]含氟聚合物
🗣️ 情景例句
How about a date with your grandfather?
和你爷爷约个会好吗？
If you run after two heares, you will catch neither.
两头落空。
but each year, the dogs are still sent out into the snow whenever a traveller is in difficulty.
但每年还要派狗到雪山地里去帮助那些遇到困难的旅游者，