Can you stand guarantee for Jack?

你愿意为杰克担保吗？

youdao

I stand guarantee for Mary's good behaviour.

我担保玛丽的品行。

youdao

When things go badly, I guarantee that the first time you stand up for your team member when it was in fact something that that person did whether intentional or unintentional, as is often the case.

当事情进行的不顺利时，我保证，当你第一次站出来，支持你的手下时，当你的手下实际上，犯了错误，无论是有意还是无意，不过大多数情况都是后者。

youdao

Professor Tim Congdon, UKIP's economic spokesman, said Mr Cameron's promise to stand up for British interests in Europe - including his guarantee of a vote on the Lisbon Treaty - had turned "to jelly".

BBC: UK Politics