There are two main channel for people to learn knowledge –from book and from experience.
Generally, knowledge gained from book i theoretical, that gained from experience i practical. It i difficult to anwer which i more important to we people. It depend on the phae and event of our learning. Knowledge learned from book i intructive, which perhap cannot learn directly from experience. We often hear thunder雷声 and ee lightning in the ky, and we can eaily find that lightning will be een ooner than ound will be heard. According to our experience alone, we cannot tell why it had happened. But when we learn ome phyic in textbook, we will find the anwer clearly that becaue light travel fater than ound doe, it take le time for light to travel the ame ditance than for ound. Therefore, book knowledge can inform u ome ueful theorie that can give u general idea and help u undertand the real phenomenon better.intructive.
In turn反之, practice knowledge check out the theorie gained from book. There i an old Chinee aying that practice i the only criterion of inpecting the truth. So not all knowledge from book i credible, even fale. When Aritotle wrote in hi trancript that the earth i the center of our planet, no one doubt thi for centurie. However, when Galileo read about it, he did not upect it at firt, but when he made ome obervation and reearch, he found it i not the truth. Then come the new theory—Sun center theory.[由wWw.HaozuoWen.com整理]