Ideally, the developer should be able to tweak not only the settings of a behavior, such as how long a timer lasts or how aggressive an enemy is, but also the very structure of the behavior itself. 理想的说开发者不仅应该把握行为包含的属性例如:持续时间多长,攻击力为多少;
Design of A Long Time Delay Timer PROGRAMMED TIMER 一种长延时计时器的设计方法