Never cover up the mistakes that you have really made.

你要是错了，就说自己错了，千万不要掩盖错误。

youdao

You don't have to cover up mistakes but do what's best for the organization.

你无需再为他掩盖错误，仅仅专注做对组织最有利的工作。

youdao

But people will not easily forgive the mistakes of the heart, the ill intention, the bad motives, the prideful justifying cover-up of the first mistake.

然而，人们一般不会轻易原谅那种“心”的错误，带有恶意的错误，怀有不良动机的错误，以及那种为了面子而拼命掩饰第一次错误的行为。

youdao

Things turned increasingly bitter on September 13th when Henry Waxman, the senior Democrat on the committee, criticised Mr Burton for his public accusations that Ms Reno led a six-year effort to cover-up the mistakes of Waco.

ECONOMIST: The Waco investigation

"They picked up the concept, but with the extra revenue to cover up mistakes, " says Ganis.

FORBES: Sports Business

An Administration could no longer resort to the printing press to cover up financial mistakes.

FORBES: Alexander Hamilton Got It Right