Wofatit
离子交换树脂
🗣️ 情景例句
When do you need the money?
你什么时候需要钱？
This is the last time I'll ever ask you to do anything for me.
这是我最后一次要求你为我做事情。
I have the quotations you asked for.
你要的报价已经做好了。