Original
Method binding
Methods can be static (the
default), virtual, or dynamic. Virtual and dynamic methods can be
overridden, and they can be abstract. These designations come
into play when a variable of one class type holds a value of a descendant class
type. They determine which implementation is activated when a method is called.
See also
译文
方法绑定
方法可以是静态的（static）（缺省情况下）、虚拟的（virtual）或动态的（dynamic）。虚拟方法和动态方法可以被覆盖（overridden），并且可以是抽象的（abstract）。当一个类类型的变量保存了后裔类的值时，这些指示进入并影响到其后裔类的行为。