Polysulfone
[化] 聚砜; 聚砜类
🗣️ 情景例句
And what does your father do?
令尊是做什么的？
Keep your body clean!
身体要常保持清洁。
In the afternoon, classes are over at 3:30, and I get home at about 4:00.
下午三点半下课，我大概四点到家。