The choice of a proper module structure is the key to achieving the aims of reusability and extendibility. 一个适当的模块结构的选择是达成复用性和扩充性目标的关键。
Because it uses objects as data structures to enhance productivity, simplify programming, get reusability and improve software reliability. 它使用对象作为其数据结构以提高生产率，简化程序设计，获得可复用性和提高软件的可靠性。
