You may only extend a single class and inherit its method implementations.
您可能只扩展一个类并继承其方法实现。
As you can see, working with a single class-to-table mapping isn't too difficult.
可以看到，处理单一的类到表的映射并不难。
Farhana: Hmm... does that mean that I can't have multiple methods in a single class?
Farhana：嗯…这是不是意味着在一个类里不能有多个方法？
In this article we'll look at an example of creating tests for a single class using IRAD.
本文中，我们将看一个使用IRAD为单个类建立测试的示例。
For a single class, you can define the name of the class, its attributes, and its operations.
对于一个单独的类，你可以定义类的名字，属性和操作。
You Got Spark, Kid-5 Reach level 5in any single class in Multiplayer.
在多人模式中，任一职业的等级到达5。
In Listing 2, changing parser implementations simply involves changing a single class name.
在清单2中，更改语法分析器实现只涉及更改一个类名。
Classes can be derived from only a single class, but they can implement multiple interfaces.
类只可以从一个单一的类派生，但它们可以实现多个接口。
I had to write one for Jaxen because it didn't include a single class that ran all its tests.
我不得不为Jaxen编写一个主类，因为它没有包含一个可以运行它的全部测试的类。
THE university was cross because it was paying a lecturer who had not taught a single class all year.
如果一所大学给一位讲师支付薪水，而这位讲师在整整一年内连一节课也没有上过，那校方自然会对此不满。
The shift could be as simple as creating a single class to represent our actor, as shown in Figure 4.
这个转变可能就像创建一个类来表示参与者那样简单，如图4所示。
Templates let us write a single class or function definition that can be used on a variety of types.
使用模板可以编写一个类定义或函数定义，而用于多个不同的数据类型。
Martin Fowler describes it as: Putting all presentation state and behavior for a window in a single class.
MartinFowler的回答是：将一个窗口所有的表现状态和行为都放在一个类里。
Modern vector control for malaria is exceptionally dependent on a single class of molecule, the pyrethroids.
现代的疟疾病媒控制特别依赖于单一化学分子，即除虫菊酯。
The model generalizes the equilibrium model for stochastic traffic networks of single class of travelers.
该模型概括了旅客的单类随机交通网络均衡模型。
Figure 8 presents the solution for the third mapping strategy — mapping a single class to a single data entity.
图8显示了第三种映射策略的解决方案——将单个类映射成单个数据实体。
By using a single class, you make it easier for testers to change database providers and connection strings.
通过使用单个类，您将使测试人员更加方便地更改数据库提供程序和连接字符串。
XDoclet is a tool that lets you write only a single class for EJB for database access instead of a minimum of four classes.
XDoclet是一个非常有用的工具，使用这个工具您只需要为访问数据库的EJB编写一个类即可，而不用编写4个类。
The Data Abstract Layer consists of a single class to provide location-related data to the business layer (see Figure 3).
数据抽象层包含一个类，用于向业务层提供关于位置的信息（请参见图 3）。
It is again applicable to a single class and is determined by the number of different services requested from other classes.
它同样适用于单个类，并由其他类请求的不同服务的数量决定。
First, there are more teams and it simply isn't possible to spend enough time with each of them during a single class meeting.
首先，较之以往我们有了更多的团队，不可能有足够的时间让每一支团队都进行展示。
The third solution, which I cover in this article, is to write a single class that dynamically molds itself at runtime to the fields of a given table.
第三个解决方案，也是我在本文中介绍的，是编写一个类，在运行时动态地把自己塑造成指定表的字段。
In a perfect world, lecture notes from a single class are kept in a single, dedicated notebook in the correct sequence. But this is the real world!
完美的情况是，每种课程的课堂笔记以正确的顺序用一个专门的笔记本记录。
Figure 3 shows the first example of this type, with the same XML document structure bound to a single class rather than the pair of classes used previously.
图3显示了该类型的第一个示例，它将相同的XML文档结构绑定到单个类，而不是以前使用的两个类。
Ceramics, Pottery, or Sculpting: Going to a single class, or taking a series of ceramic classes can give you a chance to sit and talk while experimenting with your creativity.
陶艺与雕刻：参加陶艺课程，无论单次还是系列的，都能给你一面坐着交谈一面实践创造力的机会。
If you're just writing a single class to test your intuition about an API and you will throw it away immediately after running it once, then you don't have to put it in a package.
如果您在编写一个只使用一次就丢掉的类——比如测试一个API的类——则无需将它放到包中。
The biggest advantage to this approach is that it is still fairly easy to perform AD hoc reporting, given that all the data you need about a single class is stored in only one table.
这种方法最大的好处是，它仍然能相当容易地执行专门报告，只要您所需的有关单一类的所有数据都只存储在一张表中。
In the past, successful SIMD and MIMD parallel processors were often special-purpose machines dedicated to a single class of scientific or real-time single processing applications.
过去，成功的SIMD和MIMD并行处理机通常是指用于科学处理应用或实时信号处理应用的专用计算机。
We definitely want to avoid as best as possible a single class being far and away better than all others at something (such as mobility) and thus used exclusively for specific tasks.
我们会尽量避免一个角色比其他角色在某些方面（比如移动力）强太多。
You can put all of them in a single class or interface (to centralize all of your message definitions in a single location), or you can place these constants in the classes where they are used.
可以将它们放在单独的类或接口中(将所有消息定义集中到一个地点)，也可以放在使用到它们的类中。
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