LuaLaTeX pdf：两列中的标记方程不起作用

Question

试图让它以两列标记方程的形式出现，但是我有一个浮动的（5）列和垂直未对齐的列。有谁知道怎么解决吗？

 To calculate these properties the following equations were used:
    \begin{multicols}{2}
    \begin{align}
        &\text{Axial Strain:}&\epsilon_{a}&=\frac{\delta L}{L_{0}}\label{eq:AxialStrain} \\
        &\text{Volumetric Strain:}&\epsilon_{p}&=-\frac{\delta V}{V_{0}}\label{eq:VolumetricStrain}\\
        &\text{Radial Strain:}&\epsilon_{r}&=\frac{\epsilon_p-\epsilon_a}{2}\label{eq:RadialStrain}\\
        &\text{Deviator Strain:}&A&=\epsilon_a+\frac{\epsilon_p}{3}\label{eq:DeviatorStrain}\\
    \end{align}
    \begin{align}
        &\text{Adjusted Area:}&A&=A_0\frac{1-\epsilon_p}{1-\epsilon_a}\label{eq:AdjustedArea}\\
        &\text{Radial Stress:}&\sigma_r&=\sigma_3\label{eq:RadialStress}\\
        &\text{Deviator Stress:}&q&=\frac{P}{A}\label{eq:DeviatorStress}\\ 
        &\text{Axial Stress:}&\sigma_a&=\sigma_r+q\label{eq:AxialStress}\\
        &\text{Volumetric Stress:}&p&=\frac{\sigma_a+2\sigma_r}{3}\label{eq:VolumetricStress}
    \end{align}
    \end{multicols}

我从一个对齐开始，但这只是将所有方程放在一列中。仅使用对齐而不使用多列的问题是，您只能为每一行设置一个标签，而不是为每个方程设置一个标签

Answer 1

浮动的(5)来自\label{eq:DeviatorStrain}之后的\

LaTeX 方程不应开始一个新段落，这里就是这种情况，因为它们包含在多列中。只需添加 之前有过缩进。

回答于https://tex.stackexchange.com/questions/712637/lualatex-pdf-labelled-equations-in-a-two-columns-not-working

   \documentclass[11pt]{article}
\usepackage{graphicx} % Required for inserting images
\usepackage{natbib} % used for bibliography
\usepackage{ragged2e}
\usepackage{tabularx} %more advanced tables
\usepackage{float}
\usepackage{geometry}
\usepackage{fontspec}
\usepackage{hyphenat}
\usepackage{hyperref}
\usepackage[font={small,it}]{caption}
\usepackage{subcaption}
\usepackage{multicol}
\usepackage{amsmath}

\usepackage{titlesec}

\begin{document}

To calculate these properties the following equations were used:
\begin{multicols}{2}
  \noindent
    \begin{align}
        &\text{Axial Strain:}&\epsilon_{a}&=\frac{\delta L}{L_{0}}\label{eq:AxialStrain} \\
        &\text{Volumetric Strain:}&\epsilon_{p}&=-\frac{\delta V}{V_{0}}\label{eq:VolumetricStrain}\\
        &\text{Radial Strain:}&\epsilon_{r}&=\frac{\epsilon_p-\epsilon_a}{2}\label{eq:RadialStrain}\\
        &\text{Deviator Strain:}&A&=\epsilon_a+\frac{\epsilon_p}{3}\label{eq:DeviatorStrain}
    \end{align}
    \begin{align}
        &\text{Adjusted Area:}&A&=A_0\frac{1-\epsilon_p}{1-\epsilon_a}\label{eq:AdjustedArea}\\
        &\text{Radial Stress:}&\sigma_r&=\sigma_3\label{eq:RadialStress}\\
        &\text{Deviator Stress:}&q&=\frac{P}{A}\label{eq:DeviatorStress}\\
        &\text{Axial Stress:}&\sigma_a&=\sigma_r+q\label{eq:AxialStress}\\
        &\text{Volumetric Stress:}&p&=\frac{\sigma_a+2\sigma_r}{3}\label{eq:VolumetricStress}
    \end{align}
    \end{multicols}

\end{document}