Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
Too long. Have a seat and I'll get you a cup of tea.
太久了。请坐，我来给你弄杯茶。
I took charge of the group.
我管理过那批人。
They said that the march had been forbidden, but that wasn't true.
他们说游行向来是被禁止的，但这不是事实。