I saw him do it—cross my heart.

我看见是他干的，我可以发誓。

《牛津词典》

And I won't tell any of the other girls anything you tell me about it. I promise, cross my heart.

我不会把你告诉我的与其有关的任何事情告诉任何其他女孩。我保证，我发誓。

《柯林斯英汉双解大词典》

Didn't cross my mind, came and got coffee.

我不是一时兴起跑去泡咖啡的。

youdao

I promise that what I have told you today is true C cross my heart.

VOA: special.2010.07.11

Quite often, you guys come up with questions that never cross my mind, so it's very interesting.

你们经常能提出,非常有创造力的问题来,这非常有意思

耶鲁公开课 - 基础物理课程节选

It doesn't even have to cross my mind."

我根本就没必要去想它“

耶鲁公开课 - 死亡课程节选

What did not cross my mind as I was crossing the finish line was that I had finished.

NPR: The Finish Line: What The Bombing Was Like

It is all too often that I see mistargeted and seemingly arbitrarily placed display ads cross my screen.

FORBES: The Case For Web Display Ads

"A lot of the stuff I do, I just cross my fingers and hope that it sells, " Stitt says.

FORBES: A Snappy Way To Make Money In Stock