健康是一種動態平衡。這是一種平衡的狀態：均衡地輸入和輸出能量和物質(甚至允許生長)。

　　1.中考英語作文：健康問題

　　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.衛生健康飲食：健康一直是人們關注的問題我校要舉行以“關愛健康”為題的主題班會，請根據下表內容談談你的看法，寫一篇80字左右的演講槁。 (1)保持健康的重要性;(2)保持健康的方法;(3)保持健康的結論;(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(繩子)。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。