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. Fields are the one system the best way to store details on class level. Fields are conceptually variables at class scope. If you want to keep some information to cases within your courses (objects) you might want to use fields. A class or static variable https://paragonsector57gurgaon.blogspot.com/2025/06/signature-global-plots-farukhnagar.html