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1·Stumper a stumper. A knotty problem.

的确的确。一个棘手的问题。

2·That was a stumper. We brought experts from the media, coaches, scouts, a GM or two. Nothing.

这的确是个难题，从媒体，教练，球探或者球队经理们那里得出的答案都各不相同。

3·For Claire Sulmers, a 27-year-old fashion blogger in New York, the stumper was an 'international' dress code.

27岁的纽约时尚博客作者克莱尔·萨默尔斯(Claire Sulmers)却是被“国际化服装”的着装规定难倒的。

4·This kind of classification that comes from the system of civil law has no actual senses to us. Our criminal code stipulation concerning fault can resolve the discernment stumper problem.

来自大陆法系的这种分类，对于我们没有实际意义，我国刑法关于罪过的规定就能解决认识错误问题。