Pernitric acid
[化] 过硝酸
🧩 词语组成解析
🗣️ 情景例句
Fitness clubs are becoming more popular these days.
现在健身房越来越流行了。
What did you do the week before last?
上上星期你干了什么？
I borrowed a notebook from Tom and I lent it to Marry.
我从汤姆那儿借了一本笔记本，我又把它借给玛丽了。