近年来这方面的研究开发主要是围绕结构 、 合成 、 表征和催化反应等方面开展的. @Kent points out that Properties usually are not necessary to encapsulate fields, they might do a calculation on other fields, or provide other uses. However the meant use in the attribute is just not to truly established the values of your properties, You may use https://elancommercialsector106.blogspot.com