1PHRASAL VERB 为…担保(或保证) If you say that you can or will vouch for someone, you mean that you can guarantee their good behaviour. 为…担保(或保证)
Kim's mother agreed to vouch for Maria and get her a job. [VERBPREP. noun]
金的母亲同意为玛丽亚担保,好让她找份工作。
2PHRASAL VERB 证明;证实 If you say that you can vouch for something, you mean that you have evidence from your own personal experience that it is true or correct. 证明;证实
He cannot vouch for the accuracy of the story. [VERBPREP. noun]