<p></p><p>麻烦你用一下代码环境……</p><p><br/></p><p>补充:</p><pre class="brush:plain;toolbar:false">\documentclass{article}
\usepackage{enumitem}
\usepackage{lipsum}
\newlength{\testlen}
\newenvironment{testitem}{%
\settowidth{\testlen}{\textbf{test}}
\begin{description}[leftmargin=\testlen,labelwidth=0pt,labelsep=0pt]
\item[\textbf{test}]
\begin{itemize}[leftmargin=1.5em,labelsep=.5em]
}{
\end{itemize}\end{description}
}
\begin{document}
\begin{testitem}
\item Hello
\item \LaTeX
\item World
\end{testitem}
test
\begin{itemize}
\item Hello
\item \LaTeX{}
\item World
\end{itemize}
\end{document}</pre>