认定事实的主要证据不足的；

the main evidence for ascertaining the facts is insufficient;

youdao

但是在她竞选活动中，她不得不驳斥两个证据不足的指控。

But during her campaign she had to rebut not one but two unsubstantiated allegations of infidelity.

youdao

直至2011年，这群窃贼仍在逍遥法外，并且由于证据不足的缘故很可能无法定罪。

As of 2011, the thieves are still at large, and because of the lack of evidence it is unlikely they will ever be brought to justice.

youdao