Heteropolyanion
杂多阳离子
🗣️ 情景例句
Just three days.
只要三天。
What kind of work do you do? Are you a salesman?
你做什么样的工作？ 你是一售货员吗？
I have had so many falls that I am black and blue all over.
我摔了好几跤，全身又青又紫。