求一篇公共卫生服务有关的外文和中文翻译，100分在线等，谢谢！！急急急！！

公共卫生服务是一种成本低、效果好的服务，但又是一种社会效益回报周期相对较长的服务，它与普通意义上的医疗服务是有一定差距的。为了能够公 平、效率、合理地配置公共卫生资源，必须要明确什么是公共卫生。 美国城乡卫生行政人员委员会对公共卫生定义———公共卫生是通过评价、政策发展和保障措施来预防疾病、延长人的寿命和促进人的身心健康的一门科学和艺术。

Public health service is a low cost and good effect service, but it is a relatively long payback period social services, common sense, it is a certain medical services gap. In order to fairness, efficiency, rational allocation of public health resources, we must define what is public health. U.S. urban and rural health administrators defined --- Public Health Committee on public health through assessment, policy development and security measures to prevent disease and prolong human life and promote physical and mental health of a science and art.

可以么？你写中文我来翻译好了~