由小学到中学，所修习的无非是一些普通的基本知识。就是大学四年，所授课业也还是相当粗浅的学识。世人常称

参考答案:From primary school to high school, what we have bean studying is no more than some basic common knowledge. Even during the four years in college, the lectures given still contain some rather superficial knowledge only. People usually call university the "highest institution of learning", and this name is likely to cause misunderstanding that as if there were no other knowledge above this level. Research done in the university is only the most preliminary stage of study and the first attempt at conducting research and the emphasis is on the methodology and practice of research. Since knowledge is infinite, one’s whole life is not long enough to gain knowledge. That’s why hoary-headed people in ancient times studied the classics, which means they continued to study even when their hair turned white with age. However, there is indeed great interest and fun in such kind of study.