我在用 tex 编写对流扩散方程时遇到了问题（错误）。
\[\frac{\partial C}{\partial t} -\frac{\partial }{\partial x} \left[D_{x} \frac{\partial c}{\partial x} -u_{x} c\right]-\frac{\partial }{\partial y} \left[D_{y} \frac{\partial c}{\partial y} -u_{y} c\right]-\frac{\partial }{\partial z} \left[D_{z} \frac{\partial c}{\partial z} -u_{z} c\right]=F\left[c,t\right]\]
它应该可以
文档分为多个部分：
主要文件
\documentclass[oneside,12pt]{Classes/CUEDthesisPSnPDF}
\usepackage{amsmath}
\begin{document}
\tableofcontents
\listoffigures
\listoftables
\printnomenclature %% Print the nomenclature
\addcontentsline{toc}{chapter}{Nomenclature}
\include{Introduction/introduction}
\include{Chapter2/chapter2}
\include{Chapter3/chapter3}
\include{Chapter4/chapter4}
\include{Chapter5/chapter5}
\include{Conclusions/conclusions}
\bibliographystyle{plainnat}
\renewcommand{\bibname}{References} % changes default name Bibliography to References
\bibliography{References/references} % References file
\backmatter % book mode only
\appendix
\include{Appendix1/appendix1}
\end{document}
附录文件实际上与其他部分没有什么不同......但是当我写方程式时，其他部分没有任何问题......
帮助？