尝试这样的操作:
\documentclass{report}
\begin{document}
\begin{enumerate}
\item The Ocean \textendash{} \textquotedblleft{}Precambrian\textquotedblright{}
\item The Ocean \textendash{} \textquotedblleft{}Aeolian\textquotedblright{}
\end{enumerate}
\end{document}
它将产生: