While the author thinks that the price of saving species is too high, I assure you that this noble cause is priceless.

虽然作者认为拯救物种的代价太高，但我向你保证，这项崇高的事业是无价的。

youdao

I assure you that she can be trusted to do the job.

我担保她能做好这项工作。

《新英汉大辞典》

I assure you that is not my intention.

我可以向你保证这不是我的意图。

youdao

But I can assure you that no instructions have been issued by Mr.Zardari or the government to block any private television channels,".

VOA: standard.2009.03.14

And I said to my advisor, "No, no. I have taken chemistry in high school, and I can assure you that chemistry has no relevance whatsoever to the life sciences."

于是我就去和我导师说：,“我在高中学过化学，我向你保证化学和生命科学,没有任何关联“

麻省理工公开课 - 化学原理课程节选

Well I grew up in Michigan and I can assure you that Michiganders love all those things too and probably even more.

我在密西根州长大,所以我敢保证密西根人也很喜欢这些东西,甚至比南方人更喜欢

耶鲁公开课 - 美国内战与重建课程节选

OK, the day is shot, but I assure you that no stone will be left unturned with this doctor.

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As Chairman of the House Budget Committee, I assure you that we want to work with the President to restrain federal spending.

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And at the end of the day, if there is a way out of this global unemployment conundrum, I assure you that most likely we will have to work to find it.

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