To test if a category is enabled, you exploit a feature of the history instance.
为了测试一个类别是否可用，您可以利用历史实例的特征。
The ability to examine the metadata of a type or object instance at run time is a powerful feature.
在运行时检查类型或对象实例的元数据的能力是一个非常强大的功能。
These rules suggest that an application cannot predict the concrete feature element names or geometry element names that might appear in a GML instance document.
这些规则表明一个应用程序不能预知具体的特性元素名或几何元素名，它们有可能出现在GML实例文档。
Generality: Without having to list all possible element names, the code is general enough to encompass the variation of different feature elements that might appear in instance documents.
通用性：由于不需要列出所有可能的元素名，使代码更加通用，可以包含可能出现在实例文档中的不同特性元素的变体。
Second, you may notice the disk-offload feature during the configuration of the cache instance.
第二，您可能在缓存实例的配置过程中注意到磁盘分流功能。
The automated valet-parking feature on the EN-Vs could, for instance, be used off public roads at places like shopping centres.
例如，EN-V的自动代客泊车功能可用于从购物中心这类地方的公共道路上让车下路。
This feature is richer than function Pointers because it allows the inner class instance to retain a reference to the environment in which it was created.
该特性比函数指针更强大，因为它允许内部类实例保持对创建它的环境的引用。
Includes a high-availability data replication (HDR) feature for disaster recovery and continuous log restore, point-time instance-wide restore, and table-level backup and recovery.
内含高可用性资料抄写 (HDR)功能，以便提供灾难回复与连续记录还原、时间点实例层面还原、表格层次备份及回复。
Another important feature of composition aggregation is that the part class can only be related to one instance of the parent class (e.g. the Company class in our example).
组合聚合的另一个重要功能是部分类只能与父类的实例相关(举例来说，我们例子中的Company类)。
You can tell the parser how to validate an instance document by setting the validation feature on a SAX2XMLReader API or a DOMBuilder API.
通过在SAX2XMLReaderAPI或DOMBuilder API中设置验证特性，可以告诉解析器如何验证一个实例文档。
To launch this feature, right-click the server instance, and select the Site Designing Portlet option (Figure 15).
为了启动该特性，您可以右击服务器实例，并选择SiteDesigningPortlet选项(图15)。
Instead, we will focus on the practical application of this new technology, how to use the Messaging Resources feature to build a particular instance of an ESB.
作为替代，我们将会关注这一新技术的实际应用，怎样使用MessagingResources特性构建ESB的特定实例。
For example, if the application doesn't intend to use On-Bar utilities, then that feature can be safely excluded from the source instance.
例如，如果应用程序不使用On - Bar工具，就可以从源实例中排除这个特性。
While creating a new server instance, you can enable this feature in the new server creation wizard (Figure 17).
当您在创建一个新的服务器实例时，您可以在NewServer创建向导中激活该特性(图17)。
This feature allows the user to create a new instance of the AIX Base Operating System (BOS) within the running rootvg.
该特性允许用户在正在运行的 rootvg 中创建一个新的AIX基本操作系统 (BOS)实例。
XForms documents feature a data model which contains one or more XML instance documents.
X Forms文档带有一个包含一个或多个XML实例文档的数据模型。
XForms documents feature a data model that contains one or more XML instance documents.
X Forms文档有一个数据模型，包含一个或多个XML实例文档。
Creating a public URL is a handy feature exposed by S3; in fact, with S3, you can create a public URL that is only valid for a period of time (for instance, 24 hours).
创建一个公共url是S3提供的一个便捷功能；实际上，使用S3，您可以创建一个公共url，但只在一段时间内有效(例如，24小时内)。
If the (optional) single-instance-storage feature is turned on, an additional hash code (based on the mail content and other fields) must be generated.
如果打开单事务存储特性(可选)，那么必须生成一个附加的散列码(根据邮件内容和其他字段)。
Horizontal clustering is achieved by clustering the queue managers and brokers using the multi-instance feature, which provides the following advantages.
水平集群通过使用多实例特性设置队列管理器和代理的集群来实现，水平集群提供以下好处。
One usage of the snapshot feature may be to roll back a corrupted HDFS instance to a previously known good point in time.
一个使用可能快照功能的情况是一个失效的HDFS实例想要回滚到之前一个已知是正确的时间。
To implement this feature you could create a new Wicket panel component and add its instance to the desired web page.
要实现该功能，你可以创建一个新的Wicket面板组件，将其实例添加到需要的网页中。
Message broker V7 builds on this feature to add the concept of multi-instance brokers.
MessageBrokerV 7通过该特性来添加多实例代理的概念。
Process instance migration is an important new feature in WebSphere Process Server V7 that enables process instances to be migrated to a new version of a business process.
流程实例迁移是WebSphereProcessServerV7 中一个重要的特性，支持将正在运行的实例迁移到新版业务流程中。
For instance, The Triplets of Belleville, a critically acclaimed film that was nominated for the best animated feature Oscar this year, opened on just six screens nationwide.
比如《疯狂约会美丽都（Triplets ofBelleville）》这部广受好评，并获得奥斯卡最佳动画片提名的片子，只在全美6个影院上映过。
The relationship between the detection of feature points and the measurement of motion parameters is studied in this instance of ignoring the camera calibrate errors.
在不考虑摄像机内外参数标定误差的情况下，研究了标志点像元的测量精度对运动参数测量的影响。
High-end restaurants feature more of a classic style (shirt, pants) than those found in fast-food restaurants, for instance, which favor casual wear in the form of polos and tracksuits.
高级餐厅比快餐厅的制服风格更经典，通常是衬衫和长裤，而快餐厅会穿休闲服装，比如马球衫和运动服。
High-end restaurants feature more of a classic style (shirt, pants) than those found in fast-food restaurants, for instance, which favor casual wear in the form of polos and tracksuits.
高级餐厅比快餐厅的制服风格更经典，通常是衬衫和长裤，而快餐厅会穿休闲服装，比如马球衫和运动服。
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