Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
We needed the money.
我们当时需要钱。
If she could help you, she would help you.
如果她能帮你，她一定会的。[虚拟语气]
Unlike her friends, she never gave up hope.
与她的朋友的不同之处是，她从不放弃希望。