Polysulfones
[化] 聚砜; 聚砜类
🗣️ 情景例句
To stop without a farmhouse near
为何停在没有农舍的地方
If I had known her telephone number, I would have called her.
如果我知道她的电话号码，我就给她打电话了。
I hope you are well. Thank you for your last letter.
愿你身体健康。感谢你上次来信。