Poly(oxyphenylene sulfone)
[化] 聚苯醚砜
??? 情景例句
I reminded him to work hand.
我提醒他要用功。
He washes dresses every day.
他每天都洗衣服。
Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
大家都知道，在墻壁或山腰附近發(fā)出的喊聲，就會聽到回聲。