我尝试了提出的证明技术这里：我在 Beamer 文档课上的演讲也有很长的参考书目。我曾使用允许帧中断在一个新的框架中建议这里。令人惊讶的是，框架中断停止工作！如果我注释掉\apptocmd{\frame}{\justifying}{}{}按照建议进行调整，然后框架中断再次起作用。我是 LaTex 新手。请帮忙。
\documentclass{beamer}
\mode<presentation> {
%\usetheme{CambridgeUS}
\usetheme{Madrid}
}
\usepackage{graphicx} % Allows including images
\usepackage{booktabs} % Allows the use of \toprule, \midrule and \bottomrule in tables
\usepackage{ragged2e}
\usepackage{etoolbox}
\apptocmd{\frame}{\justifying}{}{} %comment out this line will not let me justified but frame break for bibliography works then!
\begin{document}
\begin{frame}
I am confused. Please help. I am confused. Please help. I am confused. Please help. I am confused. Please help. I am confused. Please help. I am confused. Please help. I am confused. Please help.
\end{frame}
\begin{frame}[allowframebreaks]{Reference}
\bibliographystyle{plain}
\bibliography{Thesis_presentation}
\end{frame}
\end{document}