A key one is utility, which refers to the design's functionality: Does it do what users need?
一个重要的就是实用性，即是设计的功能性：它所做的迎合用户需要吗？
In this example, you will create a use case in your diagram for each of the previously modeled utility classes, since they represent the main functionality of our system.
在此例中，你将会在你的图表中为此前建模的每个工具类创建一个用例，以后它们就代表我们系统的主要功能。
Different variations of this utility provide varying levels of support and functionality.
此类工具的不同变种会提供不同层次的支持和功能。
Generalizing functionality sometimes leads to the discovery that what seemed like a single utility is really two utilities used in concert.
对功能进行通用化有时会导致您发现：某个看起来似乎像单个实用程序的程序，实际上却是配合起来使用的两个实用程序。
Using the Ntdsutil utility incorrectly may result in partial or complete loss of Active Directory functionality.
Ntdsutil实用工具使用不当可能导致ActiveDirectory功能部分或全部丧失。
Now that the plug-in's core functionality is implemented and tested, you should create a convenience service that exposes the two utility classes in a Grails-friendly way.
现在这个插件的核心功能已经实现并经过测试，您应该创建一个方便的服务，以一种Grails 友好的方式公开这两个实用程序类。
utility components that offer common functionality such as query expressions, single-sign-on and
提供了常用功能——像查询表达式、单点登录——的工具组件，它还提供了
As illustrated above, the initctl utility provides the functionality that one would expect of telinit.
正如上面介绍的一样，initctl工具提供了人们对telinit所期望的功能。
The initctl utility offers functionality similar to telinit but with some additional features specific to upstart.
initctl工具提供了类似于telinit的功能，不过增加了一些特定于upstart的特性。
Narrator is intended to provide a minimum level of functionality for blind users. Blind users will need a screen reader utility program with higher functionality for daily use.
“讲述人”为视觉有障碍的用户提供最基本的使用功能。在日常使用中，视觉有障碍的用户需要功能更强的屏幕读取器工具。
The utility model is simple and reasonable in structure, convenient and reliable to use, low in cost, rich and practical in functionality and convenient for popularization and application.
它具有结构简单、合理，使用方便可靠，成本低，使用功能多而实用等特点，便于推广应用。
The utility model has the advantages of convenient installation, good adaptability, high degree of functionality, large water discharging amount and high grade, and can meet various requirements;
产品功能化程度高、出水量大、档次高、可以满足多方面要求；
The utility model has the advantages of convenient installation, good adaptability, high degree of functionality, large water discharging amount and high grade, and can meet various requirements;
产品功能化程度高、出水量大、档次高、可以满足多方面要求；
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