插入两张并排图片：
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\begin{figure}[htbp]\centering % 居中\begin{subfigure}[t]{0.49\textwidth} % 第一个子图，宽度为文本宽的45%\centering\includegraphics[width=\linewidth]{Fig/20251019/finalSpectrum0.png} % \linewidth 使图片宽度与子图环境宽度一致\caption{The original condition is 0.} % 子图标题\label{fig:sub1} % 子图标签\end{subfigure}\hfill % 填充水平空间，将两个子图分开\begin{subfigure}[t]{0.49\textwidth} % 第二个子图\centering\includegraphics[width=\linewidth]{Fig/20251019/finalSpectrum01.png}\caption{The original condition is N(0,1).}\label{fig:sub2}\end{subfigure}\caption{A direct comparison was performed using a common color bar for the results under the original condition of 0 and those under the standard normal distribution, N(0,1).} % 总标题\label{fig:my_figure} % 总标签\end{figure}
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