Diperchromic acid
[化] 过二铬酸
🧩 词语组成解析
🗣️ 情景例句
Four o'clock at the advanced exercise class. With me.
四点钟去高级健身课， 跟我一起。
I've never read a more stirring story.
我没有读过比这更鼓舞人心的故事。
Fine. What's the weather like in Beijing?
很好。北京的天气怎样？