We promise to deliver within 48 hours.

我们承诺在48小时内送到。

《牛津词典》

We promise to deliver to your door within 48 hours of you ordering.

我们承诺在接到订单后48小时内送货上门。

《牛津词典》

When did we promise the delivery?

我们承诺什么时候交货？

youdao

And when the system fails, it is my responsibility." President Obama campaigned on a promise of "change we can believe in."

VOA: special.2010.01.23

So yet once more -- and I promise this will be one of the last times that we look back at Milton's mask - but yet once more, let's look at Comus.

因此我们要再一次--我保证,这将是我们最后一次回顾弥尔顿所写的这出面具戏,不管怎么着，让我们再次回顾《科玛斯》

耶鲁公开课 - 弥尔顿课程节选

So it is my promise to you and it is the huge staff's promise to you that we will absolutely get you through this course and you will have a good time doing so.

所以我对你们承诺，也是所有教员的承诺：,你们绝对能够通过这门课程,并且在课程中度过一个愉快的时光。

哈佛公开课 - 计算机科学课程节选

We promise to discuss ourselves in the third person voice as little as possible.

FORBES: Age of Context Draft Introduction

"What we don't want is that we promise something that we can't deliver, " Ms. Merkel said.

WSJ: Merkel, in Speech at Davos,

We promise to keep you posted, even if it requires every last dime of CNN's enormous expense account.

CNN: Express Line dispatch: On the bus in Iowa