latex 之 並排放置圖片 minipage

\begin{figure}[htbp]
\centering
\begin{minipage}[t]{0.48\textwidth}
\centering
\includegraphics[width=6cm]{test1.jpg}
\caption{World Map}
\end{minipage}
\begin{minipage}[t]{0.48\textwidth}
\centering
\includegraphics[width=6cm]{test2.jpg}
\caption{Concrete and Constructions}
\end{minipage}
\end{figure}