Diperchromic acid
[化] 过二铬酸
🧩 词语组成解析
🗣️ 情景例句
What did I do with the rings?
我把戒指放哪儿了？
I know the boy whose father is a pilot.
我知道那个男孩的父亲是飞行员。
We still think it a miracle that they we able to do so.
他们终于成功了。至今我们仍认为这是个奇迹。