Polyfluoroprene
聚氟丁二烯
🗣️ 情景例句
Oh, I'm sorry Susan isn't here.
啊 可惜Susan不在。
I have a dream.
我有一个梦想。
I would make a very poor show of disputing the ownership of a cave with a bear,
要我和一只熊去争洞穴，我会出洋相的；