文本描述的数学分数

Question

我确切知道如何生成它，但我想要一种更有效的方法。有人可以帮忙吗？

\begin{equation}
\nonumber
n=\frac{\mathrm{maximum \ fraction \  of \  the  \ river \  that  \ a \  boat \  can \  traverse  \ in  \ a  \ single \  day}}{\mathrm{distance  \ between \  campsites \  as a \  fraction \  of \  total  \ river \  length}},
\end{equation}

Answer 1

如果确实需要，则使用\text{foo foo}而不是\mathrm{foo\ foo}。该\text命令旨在在数学环境中显示文本，但在我看来，它应该仅限于短文本。

\documentclass{article}

\usepackage{mathtools}
\begin{document}
\begin{equation}
\nonumber
n=\frac{\text{maximum fraction  of  the  river  that   a   boat   can  traverse  in   a   single   day}}{\text{distance   between   campsites   as a   fraction   of   total   river   length}},
\end{equation}
\end{document}