Themoreyoulearn，themoreyouknow，Themoreyouknow，themoreyouforget.Themoreyouforget，thelessyouknow.Sowhybothertolearn.学的越多，知道的越多;知道的越多，忘记的越多;忘记的越多，知道的越少：那还学什么劲儿?