我想在两列的纸上的多行中写下以下等式？

Question

 the case of multiple resources the total time of activity \emph{"i"} with respect to the effect of personality of resources will be calculated as follows;
\begin{equation}
    TotalTime of a\textsubscript{i}= d\textsubscript{ai}Epr\textsubscript{i}   \hspace{1cm} and \hspace{.5cm}  where \hspace{.5cm} d\textsubscript{ai}Epr\textsubscript{i}= Maxd\textsubscript{ai}Epr\textsubscript{i}
\end{equation}
Where the total time of activity \emph{"a\textsubscript{i}"} will be equal to the the duration of resource \emph{"r\textsubscript{i }"} whose effect of personality and skill is equal to maximum duration of activity \emph{"a\textsubscript{i}"}.

Answer 1

你的代码输出

我提前表示抱歉，但看起来糟糕的。

为什么不将数学模式用于数学模式，将文本模式用于文本模式？

\documentclass{article}
\usepackage{amsmath}
\begin{document}
The case of multiple resources the total time of activity $i$ with respect to the effect of personality of resources will be calculated as follows
\begin{equation}
    \text{Total time of }a_i=d_{a_i}Epr_i \label{eq:totaltime}
\end{equation}
where
\[d_{a_i}Epr_i=\max d_{a_i}Epr_i\]
The total time of activity $a_i$ will be equal to the the duration of resource $r_i$ whose effect of personality and skill is equal to maximum duration of activity $a_i$.
\end{document}

---

两列：

\documentclass[twocolumn]{article}
\usepackage{amsmath}
\begin{document}
The case of multiple resources the total time of activity $i$ with respect to the effect of personality of resources will be calculated as follows
\begin{equation}
    \text{Total time of }a_i=d_{a_i}Epr_i \label{eq:totaltime}
\end{equation}
where
\[d_{a_i}Epr_i=\max d_{a_i}Epr_i\]
The total time of activity $a_i$ will be equal to the the duration of resource $r_i$ whose effect of personality and skill is equal to maximum duration of activity $a_i$.
\end{document}

或者

\documentclass{article}
\usepackage{amsmath}
\usepackage{multicol}
\begin{document}
\begin{multicols}{2}
The case of multiple resources the total time of activity $i$ with respect to the effect of personality of resources will be calculated as follows
\begin{equation}
    \text{Total time of }a_i=d_{a_i}Epr_i \label{eq:totaltime}
\end{equation}
where
\[d_{a_i}Epr_i=\max d_{a_i}Epr_i\]
The total time of activity $a_i$ will be equal to the the duration of resource $r_i$ whose effect of personality and skill is equal to maximum duration of activity $a_i$.
\end{multicols}
\end{document}