To challenge that rule, mighty heroes will need to follow more closely in Arthas's path than ever before.

为了挑战她的支配，强大的英雄们必须比以前更紧凑的追赶著阿萨斯脚步。

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The challenge in working bottom up is that it may be hard to map Strategic and Tactical requirements that were defined before the rule mining unless there is additional metadata and context available.

从下到上的方法的难点在于可能在规则挖掘之前会很难确定战略战术需求，除非有额外可用的元数据和上下文。

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Any player could sue on his own behalf or representing a class to challenge any league rule that he believes unreasonably restricts the "market" for his services.

WSJ: Roger Goodell: Football's Future If the Players Win

He had shown that a disregarded politician from a poor state could challenge the easterners' assumption that they were born to rule.

ECONOMIST: George Wallace

"I would imagine that the auto industry is going to challenge this rule, " says Martin Booher, an environmental attorney at Dewey and Leboeuf in New York.

FORBES: Magazine Article