Whether in the history or today,it is a common belief for people to consider knowledge as a treasure.Meanwhile,an increasing number of intellegent individuals come to realize the significance to practice knowledge,if they want to master it better.Two typical examples can be given：English language is a treasure which helps us to communicate with the world, but without practice , it is impossible to speak it fluently ; science is and technology is a treasure which pushes forward social development , but without practice ,it is hard for scientists to innovate. It is practice that enables humans to combine valuable knowledge with reality . As a matter of fact , intelligent people in large numbers have come to realize the significanceof practice for knowledge.

I ,as a college student, am convinced that it is of great necessity for teenagers to gain knowledge and it is of greater necessity to practice it more .Do bear in mind : practice makes perfect.