attest to

基本解释

Several witnesses can attest to her good character.
好几个证人可以证明他为人正派。
I can attest to the absolute truth of his statement.
我可以证实他的话是千真万确的。
《新英汉大辞典》
All of us who are mothers can attest to the fact that there are times when our children drive us to distraction.
我们这些做妈妈的人都能证明，事实上有时候我们的孩子也会让我们心烦意乱。

It doesn't particularly attest to any level of accomplishment.
She may not use God's name in a false oath, to attest to or swear by a false oath. She is to honor God's Sabbath day, and honor parental authority, which is arguably an extension of God's authority.
她不可以以上帝的名义宣假誓,她应该敬重上帝的安息日，敬重父母亲的,权威，尽管人们对它是否是上帝权威的延伸是有争议的。
耶鲁公开课 - 旧约导论课程节选
John Freeman can attest to that. He says he received professional surgery and excellent care from attentive doctors and nurses.

Our Jetta was a Greasecar conversion, and I can attest to very little French Fry smell.
FORBES: You Won't Smell Like McDonald's If You Drive a French Fry Car--The Best Oil Comes From Chinese Food Anyway