读入COMSOL软件所生成的三维mphtxt四面体网格文件，读入相关网格的节点、四面体单元，边界信息。调用此函数时应将包含相关的路径与文件名的字符串作为输入参数。包中包含了一个m函数文件与一个示例网格数据文件。-read the information of 3-d tetrahedron mesh file--*.mphtxt generated by COMSOL. The input parameter is the path and name of mesh file. A matlab source file and mesh file is included in it.