答案1
答案2
你可以说:
\documentclass{article}
\usepackage{enumitem}
\usepackage{tikz}
\protected\def\circled#1{%
\tikz[baseline]{\node[anchor = base,inner sep = 0pt,draw,circle]{#1};}%
}
\begin{document}
\begin{enumerate}[label = \circled{\arabic*}]
\item test
\item test
\begin{enumerate}[label = \circled{\roman*}]
\item test
\item test
\end{enumerate}
\end{enumerate}
\end{document}