小编Far*_*our的帖子

我有一张双栏纸，我想用以下代码将长文本放入括号方程中：

\begin{equation}
\small
M =\begin{cases*}
    1, & some text is in here some text is in here some text is in here some text is in here some text is in here some text is in here \\
    0, & otherwise\\
    \end{cases*}
\end{equation}

案例一的文本越过该列。我想在列宽的多行中适合案例一的所有文本。