对象刻画 1402 18 ▣( Consider not a single object but a type of objects with similar properties. Define each type of objects not by the objects' physical representation but by their behavior:the services (FEATURES)they offer to the rest of the world. External,not internal view:ABSTRACT DATA TYPES Institute of Computer Software 2022-2-27 Nanjing University对象刻画  Consider not a single object but a type of objects with similar properties.  Define each type of objects not by the objects’ physical representation but by their behavior: the services (FEATURES) they offer to the rest of the world.  External, not internal view: ABSTRACT DATA TYPES 2022-2-27 Institute of Computer Software Nanjing University 18