第1个回答 2016-05-27
I don't know what's the meaning of his sentence./I don't know what this sentence means./I don't know what these words mean.
第2个回答 2016-05-27
I do not know .
I have no idea.本回答被提问者采纳
第3个回答 2016-05-27
I don't know.what's meaning?
第4个回答 2016-05-27
I don't know the meaning of this sentence.
第5个回答 2016-05-27
I don’t know