\documentclass[12pt]{article}
\begin{document}
FIRST SENTENCE \hspace*{-2cm} \textbf{MORE TEXT OVER IT}
\end{document}
答案2
如果你知道单词重叠从哪里开始,那么\rlap可能会很有用:
\documentclass[12pt]{article}
%\url{https://tex.stackexchange.com/q/614535/86}
\begin{document}
FIRST \rlap{SENTENCE}{\tiny MORE TEXT OVER IT}
\end{document}