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

To guarantee or attest to the quality, accuracy, or condition of.

保证，担保担保或证实…的质量、准确性或条件。

youdao

To guarantee or attest to the quality, accuracy, or condition of.

保证，担保担保或证实…的质量、准确性或条件。

youdao