\documentclass[12pt]{standalone}
\usepackage{amsmath}
\begin{document}
$\underset{\text{name of the faculty}}{\underline{\hspace{6.5cm}}}$
\end{document}
但我不明白如何填写字段本身
答案1
\documentclass[12pt]{standalone}
\usepackage{amsmath}
\begin{document}
$\underset{\text{name of the faculty}}{\underline{\text{faculty of Mathematics and Mechanics}}}$
\end{document}