答案1
这是一个采用环境和一些自定义列类型来分别用于数学和文本材料的解决方案array
。
\documentclass{article}
\usepackage{array} % for '\newcolumntype' macro
\newcolumntype{C}{>{{}}c<{{}}} % for centered math operators
\newcolumntype{L}{>{$\itshape}l<{$}}
\newcolumntype{R}{>{$\itshape}r<{$}}
\newcolumntype{t}{>{$}c<{$}} % centered text material
\usepackage{amsmath, % for '\text' macro
amssymb, % for '\sqsubset' macro
booktabs} % for '\midrule' macro
\begin{document}
\[
\setlength\arraycolsep{0pt}
\begin{array}{rCl @{\qquad} t @{\qquad} RCL}
\multicolumn{3}{l}{\text{symbol}} & name & \multicolumn{3}{c}{\text{example}} \\
\midrule
x &\equiv& y & equivalence & bike &\equiv& bicycle \\
x &\sqsubset& y & forward entailment & crow &\sqsubset& bird \\
& & & $\vdots$ \\
x &|& y & alternation & elephant &|& duck \\
& & & $\vdots$ \\
x &\#& y & independence & hungry &\#& hippo \\
\end{array}
\]
\end{document}