Athletes and scientists have long known that meal timing affects performance.

运动员和科学家早就知道，用餐时间会影响成绩。

youdao

It is widely known that CFCs can damage the ozone layer.

众所周知氯氟烃会破坏臭氧层。

《牛津词典》

The president has let it be known that he is against it.

总统已经明确表示，他反对此事。

《柯林斯英汉双解大词典》

In the final days before the vote, six of the seven remaining Republican senators let it be known that they would vote not guilty.

VOA: special.2010.01.28

Relative to the whole market, It's well known that over periods of multiple decades the market has a tendency to go up.

是和整个市场相关的对吗，我们都知道经过几十年的时间周期,市场会有上涨的倾向。

麻省理工公开课 - 计算机科学及编程导论课程节选

So you know, that's not a class that MIT is... subject MIT is typically known for, but we have everything, so...

你知道，麻省理工学院没有什么特别出名的课程，但是我们的课程涵盖一切领域。所以……

求学热十足的学校 - SpeakingMax英语口语达人

It is already known that men have fewer connections between the left and right hemispheres of their brain.

BBC: Sexes handle emotions differently

But we should have known that already through our past experience with the political process.

FORBES: The Looming Failure of Obamacare, Part 3: Rent-Seeking

Collins is letting it known that he is willing to take on that mantle.

FORBES: Jason Collins, By Declaring He's Gay, Has Given Boys A New Male Sports Image