第1个回答 2013-03-15
Sorry，I don't know this problem.
Sorry,I'm not so clear about this problem.
Sorry,I con't give you answer to this question.
Sorry,I'm not knowledgeble to answer.
Sorry,I don't know much about the problem.本回答被提问者采纳
第2个回答 2013-03-15
Sorry,I can't understand the problem.
第3个回答 2013-03-15
对不起,这个问题我不是很了解
Sorry ， i'm not so clear about this problem,~
希望帮到你，
第4个回答 2013-03-15
Sorry,i do not understand this question