Diperchromic acid
[化] 过二铬酸
🧩 词语组成解析
🗣️ 情景例句
Of course not.
当然不是
Idle folks lack no excuses.
懒汉辩解，何患无词。
Please come in and sit down. But come to school earlier next time.
但下次要早点到校。