\begin{enumerate}
\item This is an item which contains text that is more than one line
long. It will be broken correctly at the line end.
\item That is the second item, which contains two subitems.
\begin{enumerate}
\item This is an item which contains text that is more than one line
long. It will be broken correctly at the line end.
\item \dots
\end{enumerate}
\end{enumerate}
These environments can also be mixed in the sense that e.g. a numbered list can contain a description
list as a sublist.