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 mechanism the way to retail store details on course stage. Fields are conceptually variables at class scope. If you would like store some data to cases within your courses (objects) you might want to use fields. Here is a code produced https://terraelegancetapukara.blogspot.com/2025/05/unlock-future-with-signature-global.html