Polyflon
聚四氟乙烯樹脂(商品名)
??? 情景例句
She got a scholarship to Cambridge but dropped out a year later.
她得到了劍橋大學(xué)的獎(jiǎng)學(xué)金，但一年后就退學(xué)了。
Prepare for a rain day.
未雨綢繆。
Three months passed, and then one morning, Sam found his wallet outside his front door.
3個(gè)月過(guò)去了，后來(lái)在一天早晨，薩姆在自己的大門外發(fā)現(xiàn)了他的錢包。