1 \begin{small} \begin{equation} ... \end{equation} \end{small} 2 定义新的变量环境 在开始 \newenvironment{sequation}{{\small\begin{equation}}{\end{equation}}} \begin{sequation} ... \end{sequation}

\vspace{1em}
        {
            \tiny
            \beamertemplatearticlebibitems
            \begin{thebibliography}{10}
%          \bibitem[Ge Wang, {\it et al},2004]{Ge04}
%       

   注意红体字

   \begin{eqnarray*}
    &&\frac{\partial \phi}{\partial t}+\nabla \cdot(\phi
    \vec{v}_{p})=0\\
    &&\vec{v}_{p}-\vec{v}=-\frac{(1-\phi)^{2}}{\xi}(\phi)[\nabla \cdot\vec{\vec{\mathrm{\Pi}}}-\nabla
    \cdot\vec{\vec{\sigma}}]\\
  

编写一个Latex文件

\documentclass[a4paper]{article}
\usepackage{pdfpages}
\begin{document}
\includepdf[nup=1x2,pages=-]{Lect1 cn.pdf}
\end{document}