Polysulfones
[化] 聚砜; 聚砜類
??? 情景例句
Hi, Susan.
嗨 Susan。
He is good at reading and writing, but he wishes he knew how to understand and speak better.
他的閱讀和寫(xiě)作是強(qiáng)項(xiàng)，但他希望知道怎樣去理解和說(shuō)得更好。
That's the stupidest thing I've ever heard!
那是我聽(tīng)到的最愚蠢的事！