Beamer 和 Polyglossa 字體指令相容性？

Question

使用文件類別時，以下文件正常運作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}

但當我切換到 Beamer 時。它似乎開始忽略字體（我們最終得到空白字元而不是希臘語或希伯來語：

\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}

輸出：

請注意，我們可以添加\setsansfont{Arial}到投影機範例，它似乎全域告訴投影機使用該Arial字體，而不是已指定的希伯來語/希臘語字體：

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}