Shocked by the results of the elections, they now want to challenge the validity of the vote.

震惊于这些选举的结果，他们现在想质疑投票的可信性。

《柯林斯英汉双解大词典》

Obama supporters mounted a legal challenge to the validity of her signatures and had some of them thrown out by a judge.

而Obama的支持者发起了对她这些签名合法性的挑战，最终使法官从名单中剔除了一部分人。

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Interest in historical methods had arisen less through external challenge to the validity of history as an intellectual discipline and more from internal quarrels among historians themselves.

人们对历史研究方法产生了兴趣，这与其说是因为外部对历史作为一门知识学科的有效性提出了挑战，还不如说是因为历史学家内部发生了争吵。

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He directed his trustees to vigorously fight anyone who contested his wishes, and he considered any type of legal challenge to the validity of the documents as an affront to his wishes.

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"The experimental evidence ... provides no reason to challenge the validity of the improvements".

BBC: graph of results trend

In the third case, it is highly likely that his lawyers will seek to challenge the validity of his indictment in the constitutional court.

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