That's because objects in the real world just don't fit into a simple single inheritance hierarchy.
那是因为实际世界中的对象不会刚好适合一个简单的单继承层次结构。
Keep your inheritance hierarchy simple.
保持简单的继承层次结构。
The reason is simple: The module has an inheritance hierarchy of its own.
原因很简单：模型具有自己的继承层次结构。
Of course, inheritance criteria extends into native queries just as strongly as it does the simple object queries I've done so far.
当然，当继承条件扩展到原生查询中时，其功能就跟我所做过的简单对象查询一样强大。
Here is a simple example of normal inheritance. We define a Noble base class, with subclasses such as Prince, Duke, Baron, etc.
这里有一个普通的继承的简单例子，我们定义了一个Noble基类，它有子类Prince,Duke,Baron等等。
This silence is odd, considering that there is a simple mechanism in XML Schema that can be used to provide the same effect as implementation inheritance: the extension mechanism.
这种沉默是暂时的，因为XMLSchema中有一种简单的机制可以用来达到与实现继承同样的目的：扩展机制。
Given an object (such as Foo, defined below), static crosscutting makes it quite simple to create new methods, add additional constructors, and even alter the inheritance hierarchy.
给定一个对象(比如下面定义的Foo)，静态横切使得创建新方法、添加附加的构造函数，甚至改变继承层次都变得十分简单。
There are also reliefs to shelter capital gains and, importantly, agricultural land is exempt from inheritance tax when simple conditions are met.
并且还有减免税保护资本收益，重要的是，只要满足简单的条件，农业土地就可以免遗产税。
Inheritance (and, by extension, polymorphism) in db4o really is that simple.
db4o中的继承(以及多态)其实就是这么简单。
The equivalence of public inheritance and isa sounds simple, but in practice, things aren't always so straightforward.
公有继承和“是一个”的等价关系听起来简单，但在实际应用中，可能不会总是那么直观。
Demonstrates creating a simple composite control and extending its functionality through inheritance.
演示如何创建一个简单复合控件并通过继承扩展其功能。
This simple and primitive use for inheritance is, at times, the perfect solution to your problem.
这种简单而原始的利用继承的方式有时可能是最有效的解决方案。
The ideas of inheritance and dynamic binding are conceptually simple but have profound implications for how we build our applications and for the features that programming languages must support.
继承和动态绑定的思想在概念上非常简单但对于如何创建应用程序以及对于程序设计语言必须支持哪些特性它们的含义深远。
The ideas of inheritance and dynamic binding are conceptually simple but have profound implications for how we build our applications and for the features that programming languages must support.
继承和动态绑定的思想在概念上非常简单但对于如何创建应用程序以及对于程序设计语言必须支持哪些特性它们的含义深远。
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