並前往http://www1.geo.ntnu.edu.tw/~shensm/Course/CourseWork/TaiGeom_Stu90/%E5%8F%B0%E4%B8%AD%E7%9B%86%E5%9C%B0%E8%88%87%E8%BB%8A%E7%B1%A0%E5%9F%94%E6%96%B7%E5%B1%A4%E5%8D%97%E7%AB%AF%E6%B8%B8%E5%85%83%E7%91%8B/frame%20layer%204-4.htm