描述环境，缩进第一行

Question

是否有一种巧妙的方法可以将环境中项目的第一行推description到右侧，以便与项目的第二行齐平？

我正在尝试定义一个与我的引文一致的 LaTeX 列表环境。列表项将被命名，而不是编号，因此我一直在尝试使用环境description来执行此操作。我想要得到的是：

  Here is some regular text. Note the regular para-
graph indenting.

    Here is some text inside a default quote envir-
    onment.

Here is some regular text.

    Apples: Here is the first item.

    Oranges: Here is the second item. It wraps on-
    to a second line, and is flush with the first
    line about oranges.

Here is some more regular text.

我正在努力获得这个结果。我一直在尝试enumitem，但没有成功（可能是我自己的错 - 我一直无法理解enumitem间距命令）。如果真的需要，我可以使用quote环境而不是任何类型的列表来获得结果，但这显然不是理想的。

非常感谢您的任何建议。

Answer 1

有个建议enumitem。的缩进长度2\parindent可能有点大，但当然可以改变。

\documentclass{article}

\usepackage[textwidth=20em,showframe]{geometry} % yes, I borrowed this from Qrrbrbirlbel
\usepackage{enumitem}
\newlist{Description}{description}{1}
\setlist[Description]{labelindent=2\parindent,leftmargin=2\parindent}

\begin{document}
Here is some regular text.
Note the regular paragraph indenting.
\begin{quote}
    Here is some text inside a
    default quote environment.
\end{quote}
Here is some regular text.
\begin{Description}
    \item[Apples:] Here is the first item.

    \item[Oranges:] Here is the second item.
    It wraps onto a second line, and is
    flush with the first
    line about oranges.

    More paragraphing.
\end{Description}
Here is some more regular text.
\end{document}

Answer 2

像这样吗？

代码

\documentclass{article}

\usepackage[textwidth=20em,showframe]{geometry}
\newenvironment{Description}{\list{}{%
    \let\makelabel\descriptionlabel    % this comes from the original description environment
    \setlength{\rightmargin}{\leftmargin}% this comes from the original quote environment
    \setlength{\labelwidth}{0pt}%          this is new
    }}{\endlist}

\begin{document}
Here is some regular text.
Note the regular paragraph indenting.
\begin{quote}
    Here is some text inside a
    default quote environment.
\end{quote}
Here is some regular text.
\begin{Description}
    \item[Apples:] Here is the first item.

    \item[Oranges:] Here is the second item.
    It wraps onto a second line, and is
    flush with the first
    line about oranges.

    More paragraphing.
\end{Description}
Here is some more regular text.
\end{document}

输出