第1个回答 2010-12-04
I'm sorry , I can't understand you . The question is too difficult for me . So I can't answer your question , I'm so sorry .本回答被提问者和网友采纳
第2个回答 2010-12-04
I'm sorry, but this problem some difficulty, I did not understand, so I can't answer it down.
第3个回答 2010-12-06
I'm really sorry.Those question are difficult to me,I can't understand it.That's the reason I can't answer the question.
第4个回答 2010-12-18
Sorry for I can't understand you, cause the question is too much difficult for me, and I have no idea how to answer it.