The two @property and regular getters and setters have their pros. It depends upon your use circumstance. 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. This variance in syntax is actually rather subtle and can lead to a "gotcha" which happens to be described by Monthly bill Wagner within a publish entitled I https://www.tumblr.com/aipljoydistrict