1.As a complex system, water resources value is composed of three dements : nature, economy and society.
水资源价值是一个复杂的体系。主要由三方面要素构成，即：自然因素、经济因素、社会因素。以成都市为例。
2.There are different dements which affect the employment of college graduates, like policies, colleges, market, inpidual and so on.
影响高校毕业生就业的因素是多方面的，它涉及到政策、高校、市场、个人等各个层面。
3.Because of different rock types, chemical dements of the soils differ.
母岩类型不同，土壤地球化学成分存在较大的差异；