Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
I'll phone you.
我会给你打电话的。
I have just finished my work.
我刚刚完成我的工作。[表示刚刚完成的动作]
The officers got out and the prisoner stood to attention and saluted as they passed.
军官们下了车，战俘立正站好，并在他们从他面前经过时敬了礼。