To start, Listing 7 creates a simple Animal having an attribute of name and an action of speak.

比如，清单7创建了一个简单的Animal，它具有name属性和speak 动作。

youdao

To start, Listing 7 creates a simple Animal having an attribute of name and an action of speak.

比如，清单7创建了一个简单的Animal，它具有name属性和speak 动作。

youdao