我没有答案。
I have wracked my shabby brain and can find no answer.
我寻遍我愚笨的脑袋却也无法找到答案。
I have been puzzling over this problem for hours and find no answer.
我苦想这道题，想了几小时还是没有结果。
但我找不出任何答案。
This is a question I find no reason to refuse to answer.
这问题问的不回答都不行。
This is a question I find no reason to refuse to answer.
这问题问的不回答都不行。
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