✦ Determine new course interfaces using easy general public characteristics and stay clear of defining setter and getter methods. 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. Applying properties permits you to start with ordinary attribute accesses and then back them up with getters and setters Later on as essential. Many, or all, https://share.evernote.com/note/ea58f2d1-1fad-d2e9-a6ee-0cfba44aece4