说明：  如何设计成功的软件产品，一个好的产品，必须具备三个属性，一是产品的需求 性、二是产品的竞争属性、三是产品的用户需求元素。
(How to design successful software product, a good product, you must have three attributes, first, demand for the product of the second attribute is the product of competition, the three elements of the product needs of users.)