chaining up短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 锁住 A constructor for the base class is always called during the construction process for a derived class, chaining up the inheritance hierarchy so that a constructor for every base class is called. 一个基类的构造方法在它的派生类的对象创建过程中是会被调用的,根据继承关系图一层层追溯,所有基类的构造方法都会被调用的。 xue5