\begin{figure*}[htbp]
\centering
\begin{minipage}[c]{0.45\textwidth}
\centerline{\includegraphics[scale=.328]{figs/}}
\caption{Curve $F=0$ was bounded by two conic curves $f_{1}=0$ and $f_{2}=0$. \textcolor[rgb]{1.00,0.00,0.00}{What is the expression of $F$? and where is the triangular domain (as you always emphasize the tri-box, you'd better illustrate it in the figs )?}}
\label{ago2pic2}
\end{minipage}
\hfill
\begin{minipage}[c]{0.45\textwidth}
\centering%该小页居中排放图片
\centerline{\includegraphics[scale=.35]{figs/}}
\caption{Surface $F$ (middle surface) are bounded by two degree 2 surfaces (the pink and green meshes) in 3-dimension, . \textcolor[rgb]{1.00,0.00,0.00}{\emph{combine Fig1 and Fig 2 into a single Fig with two subfigs}}}
\label{ago2pic3}
\end{minipage}
\end{figure*}
效果如下：
\begin{figure}[htbp]
\centering
\subfloat[]{
\label{fig:box}
\begin{minipage}[c]{0.3\textwidth}
\centering
\centerline{\includegraphics[width=3cm,height=3cm]{}}
\end{minipage}
}
\centering
\subfloat[]{
\label{fig:triangle}
\begin{minipage}[c]{0.3\textwidth}
\centering
\centerline{\includegraphics[width=3cm,height=3cm]{figs/}}
\end{minipage}
}
\centering
\subfloat[]{
\label{fig:newtriangle}
\begin{minipage}[c]{0.3\textwidth}
\centering
\centerline{\includegraphics[width=3cm,height=3cm]{figs/}}
\end{minipage}
}
\caption{
The pink domain is candidate region (a) Rectangular parameter domain by~\cite{Nishita:1990:rayRS}; (b) Triangular parameter domain by using~\cite{Nishita:1990:rayRS}; (c) Triangular parameter domain just keep $u_{min}, v_{min}, w_{min}$. }
\label{RT}
\end{figure}
效果如下：