Polyflon
聚四氟乙烯树脂(商品名)
🗣️ 情景例句
What's it about?
是关于什么的？
Many a slip (many things fall) between the cup and the lip.
酒杯来到嘴唇边，得饮与否未可知；物未到手前，未能算己有；凡事难以十拿九稳。
The comparable speed from the Moon is only 1.5 miles per second.
而从月球出发的相应速度只是每秒1。5英里。