I guarantee that he will appear in court.

我保证他会出庭。

《牛津词典》

"I can give my customers a promise: if you eat at Peony Restaurant, I guarantee that everything you get will be the safest and the best," Yang said.

杨说：“我可以向我的顾客承诺：如果你们在牡丹餐厅吃饭，我保证你们所吃到的一切都是最安全、最好的。”

youdao

I guarantee that if you take this medicine, you'll soon get well.

我管保你吃了这药就好。

《新英汉大辞典》

President Obama said there is no guarantee that all the steps agreed to at the meeting will work,but: "I think we applied the right medicine.

VOA: special.2009.04.04

That in many cases, I can gain efficiency if I'm willing to give up space. Having said that though, there may still be a problem, or there ought to be a problem that may be bugging you slightly, which is how do I guarantee that my hash function takes any input into exactly one spot in the storage space?

普遍存在的增益和权衡,在许多的例子中,可以通过牺牲空间而得到效率方面的增加,话说回来，仍然存在一个问题,或者应该会有一个问题困扰着你,就是我如何保证我的哈希函数能够准确将,任一输入映射到相应的唯一的存贮空间中去？

麻省理工公开课 - 计算机科学及编程导论课程节选

I guarantee, more than that In fact, the people who chose where we started off 33 chose in that range.

我保证,多很多的,实际上选33的人是在这个范围内选择的

耶鲁公开课 - 博弈论课程节选

Mr. Bush: We pay a company to hack us every year, so I guarantee that we've been hacked.

WSJ: Boss Talk: Updating Doctors' Offices With the Help of Cloud Services

"I guarantee that this will be the biggest betting event that this planet has ever seen, " says Wally Prior of London-based Sporting Index, the leading spread-betting firm.

FORBES: Magazine Article

But while the president talks a good game about entitlement reform, I guarantee that any real plan he comes up with would be dead on arrival in Congress.

CNN: Commentary: Can U.S. afford trillion more in debt?