我怎样才能在表格中将长行写成两行不同的行？

Question

你好，有人能告诉我如何在表格中用两行或三行写长行吗？我做了以下操作

\newline
\begin{table}[thb]
    \centering
\begin{tabular}{ |p{3.5cm}||p{2cm}|p{2cm}|p{2cm}|p{2cm}|   }
 \hline
 \multicolumn{5}{|c|}{HE} \\
 \hline
 parameter&\multicolumn{2}{c|}{X} &\multicolumn{2}{c|}{Y}\\
 \hline
 & \makecell{A} & \makecell{D} &\makecell{A} & \makecell{B}\\
 \hline
comment  &short line    &h_2, N_2, CO_2, CO, H_2O, MeOH     &_2, N_2, CO_2, CO, H_2O, MeOH\\
 Phase&  Shortline  & This is very long line & This is very long line    &This is very long line\\
 
 \hline

\end{tabular}
    \caption{caption}
    \label{tab:my_label}
\end{table}

Answer 1

为了正确排版化学式，我使用了该chemmacros包。为了避免由于p类型列默认对齐而引入的大空白，我将第 3 列和第 4 列的内容左对齐。为此，您可以在>{\raggedright\arraybackslash}要左对齐的列的列说明符前面添加，也可以定义一个新列，就像我对第四列所做的那样：

\documentclass{article}
\usepackage{makecell}
\usepackage{chemmacros} % Provides the \ch command

\newcolumntype{R}[1]{>{\raggedright\arraybackslash}p{#1}}
\begin{document}

\begin{table}[thb]
\centering
\begin{tabular}{ |p{3.5cm}||p{2cm}|>{\raggedright\arraybackslash}p{2cm}|R{2cm}|p{2cm}|   }
 \hline
 \multicolumn{5}{|c|}{HE} \\
 \hline
 parameter&\multicolumn{2}{c|}{X} &\multicolumn{2}{c|}{Y}\\
 \hline
 & \makecell{A} & \makecell{D} &\makecell{A} & \makecell{B}\\
 \hline
comment  &short line    & \ch{H2}, \ch{N2}, \ch{CO2}, \ch{CO}, \ch{H2O}, \ch{MeOH}   & \ch{H2}, \ch{N2}, \ch{CO2}, \ch{CO}, \ch{H2O}, \ch{MeOH}   &\\
 Phase&  Shortline  & This is very long line & This is very long line    &This is very long line\\
 
 \hline

\end{tabular}
    \caption{caption}
    \label{tab:my_label}
\end{table}

\end{document}

Answer 2

我把我的答案限制在包含化学式的那一行，这似乎是最麻烦的部分——我认为第四列内容的开头也缺少了一些东西{_2, N_2, CO_2, CO, H_2O, MeOH}

请注意，您添加了一个未使用的附加列

添加\usepackage{chemfig}序言

\begin{table}
    \centering
    \begin{tabular}{ |p{3.5cm}||p{2cm}|l|l|p{2cm}|   }
        
        comment  &short line    & \chemfig{h_2, N_2, CO_2, CO, H_2O, MeOH}     & 
        \chemfig{_2, N_2, CO_2, CO, H_2O, MeOH}\\
        
        
    
    \end{tabular}
    \caption{caption}
    \label{tab:my_label}
\end{table}