网上找到的包含插图用到的函数索引及说明：

http://www.ctex.org/documents/latex/graphics/node120.html

自己的例子：

插入并列图片：

函数：

\begin{figure}

\begin{minipage}[t]{0.5\linewidth}

\centering

\includegraphics[trim = 20mm 80mm 50mm 10mm, clip, width=0.5\textwidth, height=0.5\textwidth]{fig//1.pdf}

\caption{d}。

\label{fig:Dictionary L20} %% label for second subfigure

\end{minipage}%

\begin{minipage}[t]{0.5\linewidth}

\centering

\includegraphics[trim = 30mm 80mm 40mm 10mm, clip, width=0.5\textwidth, height=0.5\textwidth]{fig//2.pdf}

\caption{d}

\label{fig:Dictionary L21} %% label for second subfigure

\end{minipage}

\end{figure}

\begin{figure}

\centering

\subfigure[box 1]{

\label{fig:subfig:a} %% label for first subfigure

\includegraphics[trim = 20mm 80mm 50mm 10mm, clip, width=0.15\textwidth, height=0.2\textwidth]{fig//1.pdf}}

\hspace{1mm}

\subfigure[box 2]{

\label{fig:subfig:b} %% label for second subfigure

\includegraphics[trim = 30mm 80mm 40mm 10mm, clip, width=0.15\textwidth, height=0.2\textwidth]{fig//2.pdf}}

\caption{Two Subfigures}

\label{fig:subfig} %% label for entire figure

\end{figure}

结果对比：