Beamer 和 Polyglossa 字体命令兼容性？

Question

使用文档类时，以下文档可以正常工作article：

\documentclass{article}
\usepackage{polyglossia}
\setmainlanguage[variant=british]{english}
\setotherlanguage{hebrew}
\setotherlanguage{greek}
\newfontfamily\hebrewfont{SBL Hebrew}
\newfontfamily\greekfont{SBL Greek}
\begin{document}

\section{First}
A greek word \textgreek{αταραξία} and a hebrew word \texthebrew{קֹהֶלֶת}

\end{document}

但是当我切换到 Beamer 时，它似乎开始忽略字体（我们最终得到的是空白字符，而不是希腊语或希伯来语）：

\documentclass{beamer}
\usepackage{polyglossia}
\setmainlanguage[variant=british]{english}
\setotherlanguage{hebrew}
\setotherlanguage{greek}
\newfontfamily\hebrewfont{SBL Hebrew}
\newfontfamily\greekfont{SBL Greek}
\begin{document}

\begin{frame}{First}
A greek word \textgreek{αταραξία} and a hebrew word \texthebrew{קֹהֶלֶת}
\end{frame}

\end{document}

输出：

请注意，我们可以添加\setsansfont{Arial}到 beamer 示例中，它似乎全局地告诉 beamer 使用该Arial字体，而不是已指定的希伯来语/希腊语字体：

Answer 1

\documentclass{beamer}
\usepackage{polyglossia}

\setmainlanguage[variant=british]{english}
\setotherlanguage{hebrew}
\setotherlanguage{greek}

\newfontfamily{\hebrewfontsf}{SBL Hebrew}
\newfontfamily{\greekfontsf}{SBL Greek}
\begin{document}

\begin{frame}{First}

A greek word \textgreek{αταραξία} and a hebrew word \texthebrew{קֹהֶלֶת}

\end{frame}

\end{document}