Perchromic acid
[化] 过铬酸
🧩 词语组成解析
🗣️ 情景例句
I want to. I haven't paid for your dinner for a long time.
我要做。我好久没帮你付吃饭的钱了。
When you're learning to drive, having a good teacher makes all the difference.
初学驾驶有好的教师指导，差别很大。
The two boys are in the river now.
两个男孩现在在河里。