工作区对象 meaning in English

workspace object

Four object classes , crop object class , region object class , control bar class , work window field object class , is created . the object is managed by its attribute , and the data is delivered by massage , which achieves the system modularized
建立了四个对象类：作物对象类、区域对象类、控制条对象类、工作区对象类；对象由其属性管理，对象间参数传递由消息来完成，较好的实现了系统的模块化。