Tetraprotic acid
[化] 四元酸
🧩 词语组成解析
🗣️ 情景例句
Always remember to wash your hands before eating.
用餐前谨记要洗手。
Whom will you have lunch with?
你将和谁吃饭？
We offered them food and spoke to them kindly, but they remained motionless.
我们给他们东西吃，客客气气地同他们交谈，但他们却一动也不动。