Polysulfonate
多磺酸盐
🗣️ 情景例句
The security guard asked the stranger for some I.D.
保安要求陌生人出示身份证。
You must have enjoyed yourself.
你一定玩的很开心。
I went further back into the cave and stopped still.
我向前走拐进岩洞，停住不动。