I made a solemn promise that I would return.

我郑重承诺我会回来的。

《牛津词典》

Do I have your promise that you won't tell anyone about this?

你保证不把这事告诉任何人吗？

《牛津词典》

I can confidently promise that this year is going to be very different.

我可以有信心地保证今年将大不一样。

《柯林斯英汉双解大词典》

In return,he had to promise that the mail would travel from Saint Louis,Missouri, to San Francisco,California, in twenty-five days or less.

VOA: special.2010.04.26

There's in those images, I think, a kind of utopian promise that the familiar, ordinary pleasures of rural life can be recaptured in a new society of plenty.

在这些图片中，我认为有一种乌托邦的希望,对乡村生活熟悉而平凡的快乐的希望,能在一个自足的新社会里重新得到快乐的希望。

耶鲁公开课 - 现代诗歌课程节选

That is, promise that they will do well-- you see this all the time.

例如他们承诺能够获得高额收益率,你时常能听到这种论调

耶鲁公开课 - 金融市场课程节选

You know the promise that lies ahead because this city has always been about the future.

WHITEHOUSE: President Obama Speaks on Expanding Our Energy Portfolio

Do these things and I promise that you'll become a speaker in high demand.

FORBES: Magazine Article

In comes a plain-speaking promise that Win Me makes computing simpler and more fun.

CNN: Cutting Edge: Into The New Millennium