Polysulfone
[化] 聚砜; 聚砜类
🗣️ 情景例句
and the problem is that it's set up primarily for kids to play.
而问题是它主要是让孩子们去玩的。
That's excellent.
那太棒了。
Hi, Li Lei! Am I late?
你好，李垒！我迟到了没有？