If our bodies are not strong, our spirit to do things will certainly be quite dull. And at the same time, we are lack of energy (ies) to study. Diseases will only attack the weak, but not the strong.

　　如果我們的身體不強壯，我們做事的精神一定會十分遲鈍。而且同時，我們也缺少足夠的精力來讀書。疾病只為侵擊體弱的人而不是強壯的人。

　　Why are our bodies not strong? Because we do not pay attention to exercise. For this reason, we students must often take different kinds (sorts) of exercise in the gym.

　　為什么我們的身體會不強壯呢？因為我們不注意運動。基于此種理由，我們學(xué)生必須時常在運動場做不同種類的運動。

　　Exercise helps us (to) strengthen our bodies and avoid disease. It also teaches us cooperation, for most exercise is played by team.

　　運動幫助我們強壯身體并避免疾病。它也教我們合作，因為大多數(shù)的運動都是團(tuán)體游玩的。