低耦合高内聚是软件设计的一个基本原则，说的是在程序的各各模块中，尽量让每个模块独立，相关的处理尽量在单个模块中完成，就是俗话说的：该干嘛干吗去！

• High coupling and low cohesion is a base principle in software design.It saies we need to the best of my abilities to independt every model and finish related process in a sigle model.