Diperchromic acid
[化] 过二铬酸
🧩 词语组成解析
🗣️ 情景例句
I fell out of the boat!
我摔到船外去了。
Your question is how we developed our product?
你的问题是我们是如何发展我们的产品？
Soon afterwards, the balloon began to descend and it landed near an airfield.
不久，气球开始降落，在一个停机坪附近着了陆。