Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
We were most impressed with your efficiency.
你的工作效率很高，我们极为钦佩。
How much is a call to the United states?
打一个电话到美国去需要多少钱？
You're just in time for the football match.
你正好赶上足球比赛。