PRINCETON – Each February, I begin the introductory electricity and magnetism course at Princeton University by telling my students that the material we will cover during the semester provides the basis for modern civilization.
发自普林斯顿——每年2月笔者都要在普林斯顿大学开设一门叫“电磁导论”的课程，并且在第一堂课上告诉学生们：正是在本学期所讲到的内容奠定了现代文明.