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1·Create an abstract parent class called DataSetBuilder.

创建一个称为DataSetBuilder的抽象父类。

2·Make an inner class in the parent class, which is a test case.

在父类中建立一个内部类，这个内部类是个测试用例。

3·If __call fails, the parent class method is invoked, and so on.

如果__ call失败，就调用父类方法，依此类推。

4·Mixins are classes that are parameterized by their parent class.

mixin 是那些由它们的父类参数化的类。

5·Can I pull more methods from the child into the generic parent class?

是否还能把更多的方法从子类提升到通用的父类中？

6·For example, we can refer to the parent class of Scrollable as type t.

例如，我们可以将Scrollable的父类引用为类型T。

7·Overriding methods in a parent class is not limited to the constructor.

父类中的重写方法不仅局限于构造函数。

8·Each application of this generic class would extend a distinct parent class.

这个泛型类的每个应用都会继承一个不同的父类。

9·When no implementation is present, the call falls through to the parent class.

当没有任何实现存在时，调用失败返回给父类。

10·Notice that Trip doesn't extend a parent class or implement a magic interface.

注意，Trip并没有扩展某个父类或者实现某个接口。