He never made a will, to the best of my knowledge.

据我所知，他从未立过遗嘱。

《牛津词典》

To the best of my knowledge, none have been successful.

据我所知，没有一次是成功的。

youdao

The text is free of factual errors, to the best of my knowledge.

就我所知，这篇课文中没有事实性错误。

youdao

And to the best of my knowledge he made no money out of it whatsoever.

NPR: Electronics Pioneer William Shockley's Legacy

"I think, to the best of my knowledge, I'm not the father, " he said.

CNN: More associates link Jackson to prescription drugs

But to the best of my knowledge and recollection, no other party does this.

BBC: BNP to put own seals on ballot boxes over fraud fears