健康是一种动态平衡。这是一种平衡的状态：均衡地输入和输出能量和物质(甚至允许生长)。

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　　1. 中考 英语 作文 ：健康问题

　　How tokeep healthy /fit?

　　All of us want to be healthy. First，we should get enough sleep during the night. We can go to bed early and get up early. Staying up late is bad for our health. Second，we must have the right kinds of food. We should eat more fruit and vegetables and less meat. We should drink a lot of water. We should have healthy eating habits. Third，we should do more exercise to build up our bodies. Finally，we should be happy everyday. Because smile will make us younger。

　　That is my advice.I hope you are healthy and enjoy your life。

　　2.卫生健康饮食：健康一直是人们关注的问题我校要举行以“关爱健康”为题的主题班会，请根据下表内容谈谈你的看法，写一篇80字左右的演讲槁。 (1)保持健康的重要性;(2)保持健康的方法;(3)保持健康的结论;(4)你的看法。

　　How to keep healthy /fit?

　　Here is my advice about how to keep healthy/fit. As a middle shool student. first you'd better do more exercise such as playing ball games ，running， swimming and jumping ropes(绳子)。Then you should pay attention to your diet or meals. Don't eat too much meat or suger，but more vegetables and fruit.Third you need enough sleep or rest . Next keep yourself happy.As people often say smiling makes younger.Last you mustn't drink wine or smoke .They are bad for your health. That is my advice.I hope you are healthy and enjoy your life。