You can rest assured that we will do our best.

你放心吧，我们会尽力而为的。

《新英汉大辞典》

Naturally, you think you can rest assured that it is correct.

自然地，您认为可以放心它是正确的。

youdao

You can rest assured that Web services are not just a vague notion.

您可以放心，Web服务并不是一个含糊的概念。

youdao

You can rest assured that they will only settle when they think their case is weak.

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"You can rest assured that the state will not interfere in your legitimate economic activities, " he promised potential investors.

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And, you can rest assured that their customers really are their main concern.

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