So based on the dynamic typing and higher-order functions, you can introduce arbitrary behavior to your classes at any time.
所以，基于动态类型和高阶函数，您可以在任何时候向类中引入任意的行为。
Most important, you can easily invoke any arbitrary behavior, one that has been added after run time.
最为重要的是，能够轻易地调用在运行时过后所添加的任意行为。
Each behavior must be able to understand and make decisions about arbitrary game objects in the world, decided at run time.
每一个行为必须能够理解并决定在游戏运行时候的任意的游戏对象。
Each behavior must be able to understand and make decisions about arbitrary game objects in the world, decided at run time.
每一个行为必须能够理解并决定在游戏运行时候的任意的游戏对象。
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