对于我添加的 100pt 值,此间距应该更大:
\PassOptionsToPackage{brazil,main=english}{babel}
\documentclass[
10pt,
a5paper,
twoside
]{abntex2}
\pdfstringdefDisableCommands{\let\uppercase\relax}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\renewenvironment*{citacao}[1][default]{%
\list{}{%
\topsep=0pt%
\itemsep=100pt%
\parsep=100pt}%
\ABNTEXfontereduzida%
\addtolength{\leftskip}{\ABNTEXcitacaorecuo}%
\item[]%
\begin{SingleSpace}%
\ifthenelse{\not\equal{#1}{default}}{\itshape\selectlanguage{#1}}{}%
}{%
\end{SingleSpace}%
\endlist}%
% \makeatletter
% \let\orig@listi\@listi
% \def\@listi{\orig@listi\itemsep=100pt}
% \makeatother
\begin{document}
Test Test Test Test Test Test Test Test Test Test Test Test
\begin{citacao}
Test
\end{citacao}
Test Test Test Test Test Test Test Test Test Test Test Test
\end{document}