答案1
作为起点——将答案下面的注释转换为代码示例:
\documentclass[a4paper]{article}
\usepackage{tabularx}
\newcolumntype{L}{>{\raggedright\arraybackslash}X}
%---------------- show page layoutdon't use in a real document!
\usepackage{showframe}
\renewcommand\ShowFrameLinethickness{0.15pt}
\renewcommand*\ShowFrameColor{\color{red}}
%---------------------------------------------------------------%
\begin{document}
\noindent\begin{tabularx}{\linewidth}{|l | L |}
\hline
Dimension & \multicolumn{1}{c|}{Characteristika} \\
\hline
Feature Selection
& {\begin{tabularx}{\linewidth}{@{} L|L|L @{}}
xxx & yyy & zzz
\end{tabularx}} \\
\hline
some text & {\begin{tabularx}{\linewidth}{@{}L|L@{}}
xxx & yyy
\end{tabularx}} \\
\hline
some longer text
& {\begin{tabularx}{\linewidth}{@{} L|L|L|L|L @{}}
uuu & vvvv & xxx & yyy & zzz
\end{tabularx}} \\
\hline
\end{tabularx}
\end{document}
(红线表示文本边框)