To attest to the legality or authenticity of by signing one's name to.

她要求这家报纸证实报道的真实性。

youdao

Most certainly, a fact that veterinarians will be the first to attest to.

当然，这个事实兽医将会首先出来作证。

youdao

In order to attest to this use of salt, I were washing hair with salt water several times, as I expected, the scalp didn't itch and the hair hardly lost.

为了证实盐的这种效用，我连续几次用盐水洗发，果然头皮不再那么痒了，而且很少有头发脱落的现象发生。

youdao

It doesn't particularly attest to any level of accomplishment.

VOA: special.2010.02.25

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.

VOA: standard.2010.04.08

Cephalon was directed to collect and submit additional data to attest to the drug's safety.

FORBES: Magazine Article

Executive branch officials troop to the Senate to attest to the verifiability of provisions they know to be deficient in important respects.

CENTERFORSECURITYPOLICY: Center for Security Policy | Submitted Testimony Of Frank J. Gaffney, Jr. Before A Joint Hearing Of The Senate Governmental Affairs Committee And The Permanent Subcommittee On Investigations

Foreclosures in New York City have virtually ground to a halt as judges question the paperwork and require lawyers to personally attest to its accuracy.

FORBES: Mortgage-Audit Firm -- Surprise! -- Finds Lots of Errors in Foreclosures