vouch|vouched|vouches

我认识他多年，可以担保他的诚信。

I've known him for years and can ___vouch for his honesty.

我的老师为我担保，说我是个诚实的学生。

My teacher ___vouched for me, saying I was an honest student.

这份报告证实了我们的研究结果是准确的。

This report ___vouches for the accuracy of our research findings.