Polysulfone
[化] 聚砜; 聚砜类
🗣️ 情景例句
How...?
你怎么……？
Well, hello, stranger! Have you moved something?
你好，久违了！你是迁居了还是怎么样啦？
That's what we did in China in the old days, before thermoses were invented, said Wei Hua.
“那是我们中国从前未发明出热水瓶时的做法。”魏华说。