Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
I think you're doing the right thing. Taking your time.
我觉得你们做得对。慢慢来。
Know something of everything and everything of something.
既要有一般常识，又要有专业知识。
No, I'm English.
不，是英国人。