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》

You may rest assured that the price we offered is the best in the market.

你方尽可放心，我们所报价格是目前市场上最低的。

youdao

You may rest assured that we have arranged to transport the goods by rail.

请放心，我们已安排好了用火车运输这批货物。

youdao

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

It may not be today, and it may not be for many years, but you can rest assured that at some point there will always be a reckoning.

FORBES: Success Will Come and Go, But Integrity is Forever