For example, when use cases and supporting tools are created, a unit tester can retrieve the appropriate class to verify.
例如，当创建用例和支持性工件时，一个单元测试人员可以恢复合适的类来验证。
Among the challenges new adopters of this technique face are how to introduce the technique into an organization and how to determine when use cases are complete.
这种技术的新采用者面临的挑战是如何将此技术引入到一个组织，以及如何确定用例何时完成。
When use cases drive solution testing, you can readily answer the question of why or what was tested, providing confidence that the solution matches the explicit expectations of the customer.
当用例驱动方案测试时，您应该知道为什么要测试以及测试什么，为这个方案能够满足消费者期望提供信任度。
Paul can't drive so he was a fat lot of use when I broke my arm.
保罗不会开车，所以我手臂骨折时他一点忙也没帮上。
When we use the same praise repeatedly, it may become empty and no longer valued by the child.
当我们重复使用同样的表扬时，它可能会变得空洞，不再被孩子重视。
When camping or picnicking, use facilities provided.
当露营或野餐时，请使用提供的设施。
When land gets developed for human use, the landscape changes.
当土地被开发为人类使用时，其地貌就会发生变化。
When on a spacewalk, astronauts use safety tethers to stay close to their spacecraft.
当宇航员在太空行走时，他们会使用安全绳以保持他们与飞船的距离。
When not in use, the fins are tucked into special grooves or depressions so that they lie flush with the body and do not break up its smooth contours.
当鱼不使用鱼鳍时，会将它们折叠起来，收回到特殊的沟槽或者凹陷部位；这样鱼鳍就可以与身体保持齐平，以维持它们平滑的外形。
See what happens when companies use stairs to advertise their products.
看看当公司用楼梯为他们的产品做广告会发生什么。
Listeners are appreciated when speakers use simple, everyday words in a presentation.
当演讲者在演讲中使用简单的日常用语时，会很受听众欢迎。
As a result, it is easy to hurt, and to be hurt, when language use is unfeelingly attacked.
因此，当无情地使用语言时，很容易伤害别人，也很容易受到伤害。
Like most tools, you need to know when and how to use it to the best advantage.
与大多数工具一样，您需要知道何时以及如何充分利用它。
Do you think the government should legislate laws to fine people who use cell phones when crossing roads and intersections?
你认为政府应该立法对那些在穿过马路和十字路口时使用手机的人罚款吗？
We usually use this pattern when the question that you're asking about relates directly to the person you're speaking with.
当你问的问题与谈话的人直接相关时，我们通常会用这种方式。
The language and style you use when making an oral presentation should not be the same as the language and style you use when writing.
你在做口头报告时使用的语言和风格与你书写时用的不同。
In order to successfully refer when we use language, there must be an appropriate relationship between the speaker and the object referred to.
为了在我们使用语言时成功引用，说话者和被引用的对象之间必须有合适的关系。
I also mention in my book that when we use the OO paradigm, it is not easy to represent graphically at all times where our application is.
在书中我还提到，当我们使用OO范式的时候，要在任何时间图形化地表示出我们的应用程序在哪里并不容易。
We often keep a straight face or use an unsmiling expression when we're making a joke.
当我们开玩笑的时候，我们经常绷着脸或使用不笑的表情。
The language and style you use when making an oral presentation should not be the same as the language in style you use when writing.
你在做口头报告时使用的语言和风格不应该与你在书面写作时使用的语言和风格相同。
Studies show that people use approximately one fifth less energy when they are billed for exactly what they use.
研究表明，当人们按实际使用量付款时，他们使用的能源大约减少了五分之一。
The period from 3000 to 1000 B.C.E., when the use of bronze became widespread, is normally referred to as the Bronze Age.
在公元前3000年到公元前1000年，即青铜器被广泛使用的这一时期，通常被称为青铜时代。
Some people think it means "I'm shy", but others only use it when they are surprised or shocked.
有些人认为它表示“我很害羞”，但其他人只在他们感到惊讶或震惊时使用它。
"Cheers", despite its popularity, is considered an informal way to say thank you—and this is a definite clue as to when you can best use it.
尽管“干杯”很受欢迎，但它被认为是一种非正式的表达感谢的方式——这也就明确说明了什么时候使用它是最合适的。
Generally speaking, it's no use talking to a person when he's in a temper.
一般来说，当一个人在气头上时，跟他谈话是没有用的。
A recent survey shows, over 53% people use the emoji when they are chatting online.
最近的一项调查显示，超过53%的人在网上聊天时会使用emoji 表情。
If you're a person who uses pet phrases when you speak, you should train yourself carefully not to use these when you speak on the phone.
如果你是一个平常说话喜欢带口头禅的人，你就要训练自己小心地避免在接听电话时使用这些。
Mexicans may use silence when instructions are given by a person in authority rather than be rude to that person by arguing with him or her.
当权威人士下达指令时，墨西哥人可能会保持沉默，而不是粗鲁地与之争吵。
When people use the Internet, they do not remember the information.
当人们使用互联网时，他们不记忆信息。
Since then, I've never closed the door when I use my bathroom.
从那以后，我上厕所的时候再也没有关过门。
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