'If only I had known you then,' he said wistfully.

“要是我那时认识你就好了。”他向往地说道。

《牛津词典》

I hope I've known you.

我希望我已与你相识。

youdao

You've been wearing those same glasses as long as I've known you.

自从我认识你以来，你一直戴着同样的眼镜。

youdao

Instead, if you attempt to open a Flash page, you get what has become known as "the blue Lego of death."

VOA: special.2010.06.22

If only you'd known you were only going to have 20 more years instead of 50 more years, you would've picked a different kind of life for yourself.

如果你知道你只剩下,20年而不是50年，你就会为自己选择另一种生活。

耶鲁公开课 - 死亡课程节选

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

We were all truly blessed to have known you and to have you in our lives.

FORBES: An Irreplaceable Casualty of the Storm: In Loving Memory of Tony Laino

Welcome to the stuff family you might never have known you had, reborn every year.

BBC: Go Figure: Why does every person need 200kg of steel a year?

Bel Air wants it known you have more to lose in bonds and more to gain stocks.

FORBES: $1 Million Invested in Stocks in 1935 is Worth $2.4 Billion Today (If You Held On)