Polysulfones
[化] 聚砜; 聚砜类
🗣️ 情景例句
If you need any help, I'll be ust over here.
如果你需要任何帮助，我都随时待命。
I'd like to travel first-class.
我要头等舱。
Susan is going to finish college.
苏珊将完成大学学业。