答案1
\documentclass{article}
\def\a{One two three. }
\def\b{\a\a Four five. \a}
\def\c{\b\b Red green blue. \b \a}
\def\d{\c\c}
\newcounter{hyp}
\newenvironment{hyp}
{\refstepcounter{hyp}\trivlist\itshape\centering\item[(\thehyp)]}
{\endtrivlist}
\begin{document}
\begin{hyp}\label{ha}
Something or other is better than that other thing
\end{hyp}
Some text about hypothesis \ref{ha} \d
\begin{hyp}\label{hb}
Black and white.
\end{hyp}
Some text about hypothesis \ref{hb} \d
\end{document}