Polyfluoroprene
聚氟丁二烯
🗣️ 情景例句
Don't worry, everything will work out in the end.
别担心，到最后一切都会顺利成功的。
Why does only one sock get lost at a time?
为什么袜子只丢了一只呢？
Is it very cold in winter?
冬季的天气很冷吗？