Polysulfonate
多磺酸盐
🗣️ 情景例句
I'm taking too much of your time.
我耽误了你很多时间。
The mining area is centered large in the north.
那里的采矿区大部分集中在北部。
Well done, everyone! she smiled.
“你们个个表现出色！”她笑了