There is no doubt that smart phone has been important part of our life. Now when we go out of the house, a smart phone can solve everything. We enjoy the convenience that technology brings, while the overuse of cell phone will be a health hazard. 
毫无疑问，智能手机已经成为我们生活中的重要组成部分。我们现在外出的时候，智能手机可以帮助我们解决一切问题。我们享受着科技带来的便利，然而过度使用手机却是会危害健康。

Recently, my uncle was shocked to find that her daughter's eyes were badly injured after playing smart phone for a long time. My uncle told us that he was busy these days and without his supervisor, her daughter played online game very late. When my cousin felt uncomfortable, the doctor diagnosed her eyesight got very serious problem.
最近，我叔叔非常震惊地发现她女儿的眼睛在长时间玩智能手机后严重损伤。我叔叔告诉我们，这些天他很忙，没有时间监督他女儿，所以他女儿玩网络游戏玩到很晚。当我表妹感到不舒服时，医生就诊断到她的视力存在非常严重的问题了。

My cousin's situation teaches me a lesson that if we don't use smart phone in the proper way, we will get hurt. There are always some news report people who used smart phone for a long time and their bodies got hurt because they lack of exercise. We need to do some sports and take regular exercise. The sound body is the foundation to realize our dreams, so don't let the smart phone control your life.
我表妹的这件事给了我一个教训。如果我们不合理使用智能手机，就会受到伤害。总是有一些新闻报道说有些长时间使用智能手机的人，他们的身体因为缺乏锻炼受到了伤害。我们需要做一些运动和有规律的锻炼。健康的身体是实现梦想的基础，所以不要让智能手机控制你的生活。