Polyfluortetraethylene
聚四氟乙烯
??? 情景例句
You had it engraved!
你在上面刻了字！
Why did't you go home?
為什么你不回家？
to work or worry about trifling things at the weekend.
在周末再讓他們為瑣事而動腦子和憂慮。