Pentachloride
五氯化物
🗣️ 情景例句
Your birthday is tomorrow, isn't it?
你明天生日 ，是吗？
I do not know whether you realize it, but this condition is essential to us.
我不知道你是否了解，但是，这个条件对我们是必要的。
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。