Polytef
[化] 聚四氟乙烯
🗣️ 情景例句
The mailman just dropped some mail in our box, Grandpa.
邮差刚刚塞进一些信件在我们的信箱， 爷爷。
I was in the hospital for several weeks.
我在医院里住了几个星期了。
Do you live near the factory?
你住在工厂附近吗？