在枚举环境中对齐文本

Question

从下面的代码中，我希望能够像这样在枚举环境中对齐文本：

感谢您的帮助。

这是我目前拥有的代码：

\documentclass{book}
\usepackage{enumitem}

\begin{document}
\begin{enumerate}
\item Pre-Emphasis - increase amplitude of higher modulating frequencies.
\item De-Emphasis - attenuate those frequencies by the amount that were boosted by the pre-emphasis.
\end{enumerate}
\end{document}

Answer 1

您可能在某个tabularx环境中能得到更好的服务。

\documentclass{book}
\usepackage{tabularx}
\begin{document}
\noindent
\begin{tabularx}{\textwidth}{@{}l@{ }l@{ -- }X@{}}
1. &  Pre-Emphasis & increase amplitude of higher modulating frequencies\\[1ex]
2. &  De-Emphasis  & attenuate those frequencies by the amount 
                     that were boosted by the pre-emphasis
\end{tabularx}
\end{document}