Perchromic acid
[化] 过铬酸
🧩 词语组成解析
🗣️ 情景例句
There are three things that have to be done first, Harry.
首先我们必须做三件事， Harry。
A faithful friend is hard to find.
益友难得。
We also want to teach all the children to perform.
我们还想教会所有的儿童演奏。