![如何标记列表?](https://linux22.com/image/402364/%E5%A6%82%E4%BD%95%E6%A0%87%E8%AE%B0%E5%88%97%E8%A1%A8%EF%BC%9F.png)
答案1
通过加载enumitem
可以轻松实现自定义布局:
\documentclass{article}
\usepackage{amssymb}
\usepackage{enumitem}
\setlist[enumerate, 1]{label=(\arabic*), labelsep=1.35em}
\setlist[enumerate, 2]{label=\alph*., align=left, labelsep=1em}
\begin{document}
\begin{enumerate}
\item \begin{enumerate}
\item Mary dated $\Leftrightarrow$ John dated Mary
\item Mary hibernated with John $\Leftrightarrow$ John hibernated with Mary
\item Mary is John’s cousin $\Leftrightarrow$ John is Mary's cousin
\end{enumerate}
\end{enumerate}
\end{document}