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@ -730,7 +730,7 @@ Object.getPrototypeOf(ColorPoint) === Point
（1）作为函数调用时（即`super(...args)`），`super`代表父类的构造函数。
（2）作为对象调用时（即`super.prop`或`super.method()`），`super`代表父类。注意，此时`super`即可以引用父类实例的属性和方法，也可以引用父类的静态方法。
（2）作为对象调用时（即`super.prop`或`super.method()`），`super`代表父类。注意，此时`super`既可以引用父类实例的属性和方法，也可以引用父类的静态方法。
```javascript
class B extends A {