Polysulphone
n. [化]聚砜
🗣️ 情景例句
How can you do business with the americans? You'll need to improve your English first.
你怎么能与美国人做生意？你得先提高自己的英文水平。
One flower makes no garland.
一木不能成林。
What do we need?
我们都需要什么？