Polyflon
聚四氟乙烯树脂(商品名)
🗣️ 情景例句
What is the charge for that?
那要多少费用？
Sigh. He doesn't even know I'm alive.
啊啊，他一直都不知道我还活着。
It certainly didn't arrive here that way.
送到这儿时可不是那样！