You may rest assured that we will do all we can to find him.

你就放心吧，我们会千方百计找到他。

《牛津词典》

Their parents can rest assured that their children's safety will be of paramount importance.

他们的家长们可以尽管放心，他们孩子们的安全将是最为重要的。

《柯林斯英汉双解大词典》

youdao

"We can feel hopeful that whatever was going to happen, which we don't know what it was, that we can rest assured that at least these young people hopefully will be back in the United States."

VOA: standard.2009.12.11

Those of you more comfortable, rest assured we'll start filling in some gaps before long if you're already familiar with this.

那些程度比较好的同学，我们马上来讲一下以前遗漏的问题,如果你们已经熟悉这门课，那会觉得那容易接受。

哈佛公开课 - 计算机科学课程节选

For some of you it may be difficult I know that and I want you to rest assured that no one in this course wishes to undermine or malign religious faith any more than they wish to promote or proselytize for religious faith.

我知道对你们中的另一些人来说这门课会有困难,不过我想要你们放心,这门课上没有人想要破灭和诋毁宗教信仰,同样也没人想要劝诱他人信教。

耶鲁公开课 - 旧约导论课程节选

Rest assured that the Domestic Names Committee has no intention of changing it now.

WSJ: In U.S., Apostrophes in Place Names Are Practically Against the Law

Rest assured, small businesses in the U.S.: this provision will not break your bank.

FORBES: Is The Affordable Care Act Really Bad For Business?

Rest assured that he, both in real life and on the internet, will be ignored.

FORBES: Yahoo! Is Fostering A Cauldron Of Hate and Anarchy