基于这个话题，我构建了如下所示的 MWE。它使用词汇表包生成带有物理单位的符号列表。列表应该在单元格之间有线条，就像表格一样。表格顶部和列表边框处的线条应该是黑色的。在每个条目之间，线条应该是灰色的。
\documentclass{report}
\usepackage[dvipsnames,table]{xcolor} % The option "table" enables coloured tables.
\usepackage[unicode=true,breaklinks=false,backref=false,pdfstartview=FitH]{hyperref} % This package is inevitable in the project.
\usepackage[acronym,sort=standard,nonumberlist]{glossaries}
\setlength{\glsdescwidth}{0.6\linewidth}
\newglossary[slg]{symbolslist}{syi}{syg}{List of physical quantities} % This is necessary in any case if a list of symbols is to be produced, no matter which style is used.
\glsaddkey{unit}{\glsentrytext{\glslabel}}{\glsentryunit}{\GLsentryunit}{\glsunit}{\Glsunit}{\GLSunit}
\newglossarystyle{symbunitlong}{
\setglossarystyle{long3col}% base this style on the list style
\renewenvironment{theglossary}{% Change the table type --> 3 columns
\begin{longtable}{| l | p{\glsdescwidth}|>{\centering\arraybackslash}p{2cm}|}}
{\end{longtable}}
\renewcommand*{\glossaryheader}{% Change the table header
\hline
\bfseries Sign & \bfseries Description & \bfseries Unit \\
\hline
\endhead}
\renewcommand*{\glossentry}[2]{% Change the displayed items
\glstarget{##1}{\glossentryname{##1}} %
& \glossentrydesc{##1}% Description
& \glsunit{##1} \tabularnewline \arrayrulecolor{lightgray}\hline\arrayrulecolor{black}}}
\makeglossaries % This seems to be necessary.
\newglossaryentry{sy-c}{name=\ensuremath{c},
description={velocity of light in vacuum},
unit={\ensuremath{\rm{m}/\rm{s}}},
type=symbolslist,
sort=c}
\newglossaryentry{sy-height}{name=\ensuremath{h},
description={Height},
unit={\ensuremath{\rm{m}}},
type=symbolslist,
sort=height}
\newglossaryentry{sy-h}{name=\ensuremath{h_{\rm{Pl}}},
description={Planck's constant},
unit={\ensuremath{\rm{J}\cdot\rm{s}}},
type=symbolslist,
sort=hplanck}
\newglossaryentry{sy-pi}{name=\ensuremath{\pi},
description={Geometrical value},
unit={},
type=symbolslist,
sort=pi}
\newglossaryentry{sy-power}{name=\ensuremath{P},
description={Power},
unit={\ensuremath{\rm{W}}},
type=symbolslist,
sort=power}
\newglossaryentry{sy-x1}{name=\ensuremath{x_1},
description={Dimensionless energy of particle 1},
unit={},
type=symbolslist,
sort=x1}
\newglossaryentry{sy-x2}{name=\ensuremath{x_2},
description={Dimensionless energy of particle 2},
unit={},
type=symbolslist,
sort=x2}
\begin{document}
\gls{sy-c}\\
\gls{sy-height}\\
\gls{sy-h}\\
\gls{sy-power}\\
\gls{sy-pi}\\
\gls{sy-x1}\\
\gls{sy-x2}\\
\printglossary
\printglossary[type=symbolslist,style=symbunitlong] % Produce the list of symbols
\end{document}
以下是输出 pdf 的相关部分：
现在，输出的pdf中出现了三个问题：
- 在最后一个列表条目下方，有一条灰线。但是，这条线应该是黑色的。我该如何实现呢？
- 为什么单位列中的条目是超链接？我该如何抑制这种情况？
- 每次列出新的字母时，如何才能抑制创建一个空行？