padding-bottom: 66.56%;">People always say to students that their main duty is to study and they should not spend time on other things except for study. However, most boys are born to love exercise, especially ball exercises. Thus, they are always blamed to spend time on playing balls, instead of spending all time on study. In my opinion, the idea is wrong. Proper exercise is good for study. Exercise can help students relax their mind and body. After a long time study, they need it very much. After relaxing, they can have a good state to study, which will improve their study efficiency. Besides, students always can sleep better after exercise. If they sleep well, they can have more energy on study. It promotes study. But spending too much time on exercise may have bad influence on study. 人們總是對學生們說他們的主要任務是學習，除了學習不應該把時間用在別的地方。然而，大部分男孩子都是天生愛運動，尤其是球類運動。因此，他們經常會被責備把時間花在打球上而不是把所有時間都放在學習上。在我看來，這個想法是錯誤的。恰當的運動是有助於學習的。運動可以幫助學生放鬆身心。經過長時間的學習，他們非常需要運動一下。放鬆後，他們可以有更好的狀態來學習，這可以提高他們的學習效率。除此之外，學生一般在運動後都可以睡得更好。如果他們睡好了，他們就有更多的精力放在學習上。這是有助於學習。但是，花在運動上的時間過多則會影響學習。
