真不明白这样做有什么不好的翻译：Really do not understand to do what's wrong with 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I really do not understand what is wrong to do so

Really do not understand to do what's wrong with

Really did not understand does this has any not not well

I really do not understand what is wrong with doing so

Really do not understand to do what's wrong with