The editorial says this argument has lost much of its validity.

这篇社论说该论点已失去了其许多合理性。

Many scientists are questioning the validity of the claims of the study.

许多科学家对研究结论的合理性提出质疑。

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

选举的结果令他们很震惊，他们现在想对投票的可信性提出质疑。

Some people, of course, denied the validity of any such claim.

当然，一些人否定了此类说法的合理性。

the validity of making children wear bicycle helmets.

让孩子们戴自行车头盔的重要性。