Let us extend our Point class with a mutator.

让我们为Point扩展一个变换器。

A mutator method exists for each attribute of a structured type.

mutator方法是为某个结构化类型(structured type)的每个属性而存在的。

Each property has an accessor and a mutator (getter and setter).

每个属性具有一个accessor和mutator (getter和setter)。

You don't define a member variable and then provide accessor and mutator methods.

定义数据成员后不需要分别定义访问和修改的方法。

The deficiency of these mechanisms will cause the emergence of the mutator phenotype.

这些机制的缺陷将导致突变表型的出现。