Control是一个抽象类。
Widget是一个抽象类。
Shape是一个抽象类。
Item是一个抽象类。
An abstract class is good as well.
抽象类的方式也很好。
No data entry directly USES an abstract class.
没有数据条目会直接使用抽象类。
Things get a little trickier when we query an abstract class.
当我们查询抽象类时，事情变得有些复杂。
A ListEditor is an abstract class that represents a list of data.
ListEditor是一个抽象类，表示一个数据列表。
The Configuration class is simply a base class — an abstract class.
configuration类只是一个基类——一个抽象类。
Response is an abstract class that represents an HTTP response.
Response是个抽象类，代表了HTTP响应。
Suppose you have an abstract class Vehicle, defined as follows in Listing 5.
假设您有一个名为vehicle的抽象类，其定义如清单5所示。
It provides an abstract class which must be subclassed to create portlets.
它提供了抽象子类来创建portlet。
An abstract class that represents the location where index files are stored.
表示索引文件存储位置的抽象类。
Notice that an abstract class is denoted by italicized text, as are abstract methods.
注意，抽象类和抽象方法用斜体表示。
In fact, an abstract class gives you more flexibility when it comes to evolution.
实际上，抽象类在具体实现时提供了更好的灵活性。
Create an abstract class named BP3Form by extending org.apache.struts.action.ActionForm.
通过扩展org . apache . struts. action . ActionForm创建一个名为BP3Form的抽象类。
You can declare standard and abstract methods in an abstract class, as shown in Listing 5.
可以在抽象类中声明标准和抽象方法，如清单5所示。
In this case, we use an abstract class to define the service specification, as shown in Figure 5.
在这种情况下，我们使用一个抽象类来定义服务规范，如图5所示。
The top level object is the Order, an abstract class that is inherited by FoodOrder and BoxOrder.
顶层对象是Order，是FoodOrder和BoxOrder继承的一个抽象类。
However, unlike an abstract class, a mixin does not try to contain the framework for a child.
然而，与抽象类不同的是，mixin并不试图包括子类的框架。
ValidationRule is an abstract class for a rule engine used to validate and format ViewController field content.
ValidationRule是规则引擎的抽象类，用来验证并格式化ViewController字段内容。
Figure 3 presents the SQL Model table objects, where table is an abstract class and can have one to many columns.
图3显示了SQLmodel表对象，其中Table是一个抽象类，它可以有1到多个列，或者0到多个用户定义类型。
A FieldEditor is an abstract class that represents a value that can be modified by a user from a Preferences page.
FieldEditor是一个抽象类，表示用户可以在Preferences页面修改的值。
This indicates that the BankAccount class is an abstract class and the withdrawal method is an abstract operation.
这表示，BankAccount类是一个抽象类，而withdrawal方法是抽象的操作。
BaseBridge, an abstract class, will contain all of the methods that you could conceivably implement in your connector.
BaseBridge是一个抽象类，包含在连接器中可能要实现的所有方法。
In the later framework, MD5 is defined as an abstract class which can be extended, but its implementation is not trivial.
在Silverlight 2的框架中，MD 5被定义为抽象类，可对其进行扩展，但实现起来非常繁琐。
Binding is now an abstract class representing a binding between two Property instances (typically associated with two objects).
Binding目前已经成为一个表示两个Property实例之间绑定关系的抽象类(通常关联着两个对象)。
To simplify coding, I have provided an abstract class DefaultMoverImpl, available through the source repository (see Resources).
要简化编码，我已经提供了一个抽象类defaultmoverimpl，可以在源码库中找到这个类(请参阅参考资料)。
A child class that extends an abstract class must implement all abstract methods in its parent or itself be declared abstract.
继承抽象类的子类必须实现在其父类或自身中声明为抽象的所有抽象方法。
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