治学之道无他,用心而已矣:从事教学与科研工作,必须要“推陈出新”.所谓“推陈”,决不是把旧有的经验一概否定;所谓“出新”,也决不是胡思乱想.譬如说,1943年我进入麻省理工大学放射实验室从事国防科研时,领导安排我做天线工作,我对天线一无所知,但学过光学电磁学,把光学 There is no way for him to learn, and his heart is gone: in teaching and scientific research, we must “make innovations.” The so-called “push-Chen” is by no means negating all the old experience; the so-called “innovation” is by no means unconscionable. Said that when I entered the Radiation Laboratory of MIT in 1943 engaged in national defense research, the leadership arranged for me to do aerial work. I did not know anything about the antenna, but I learned about optical electromagnetism and optics