I don't know that what means.大神分析一下这个句子里每个单充当什么语.that 可以省略吗?还是当一个指示代词?可以是“I don't know that means what”吗?

问题描述:

I don't know that what means.大神分析一下这个句子里每个单充当什么语.
that 可以省略吗?还是当一个指示代词?可以是“I don't know that means what”吗?