Of the abstraction. The values for getRadius() or getCircumference() in the above illustration could be saved specifically, or they could be calculated, it won't subject for the caller; the setters could or won't have Uncomfortable side effects; it does not make a difference towards the caller. 近年来这方面的研究开发主要是围绕结构 、 合成 、 https://navrajinfratechnewprojectingurgaon.home.blog/2025/06/01/luxury-rises-beyond-limits-m3m-altitude-gurgaon/