克拉克回答了这样一个问题：“社会选择何时起决定性作用，技术的具体特征何时更重要？”
Clark helps answer the question: "When is social choice decisive and when are the concrete characteristics of technology more important?"
这种模式在这样几种情形下是有用的，您可以知道一项任务何时开始以及何时停止，但是您没法知道任务进展了多远。
This mode is useful in situations where you know when a task starts and stops but have no way of knowing how far the task has progressed.
与XML文档设计相关的一个常见的问题是，何时使用属性，何时使用元素，以及这里做出的选择对性能有怎样的影响。
Related to XML document design, a common question is when to use attributes vs. elements and how that choice affects performance.
因此，一个显而易见的问题出现了：我们能不能发现泡沫何时发生，并预测它们何时破裂？
So an obvious question arises: can we spot bubbles when they occur and predict when they are about to burst?
为了取得最佳性能，我们将告诉您何时使用某些属性，何时不要使用这些属性，适当的地方我们会提供代替的解决方案。
We tell you when to use and when not to use certain properties for best performance results, and where applicable, we provide you with alternative solutions.
那么，我们如何知道何时需要防止引起反感而何时则不必担心？
对于何时使用子元素以及何时使用属性，本文提供了一些指导性建议。
This tip offers some guidance for when to use subelements and when to use attributes.
我们最后将总结何时应用数据联合模式及何时不应用此模式，并将列出重要的约束。
We will conclude by summarizing when to apply and when not to apply the data federation pattern and to list important constraints.
我们不再听从自身感觉来决定何时吃饭、何时工作、何时睡觉、起床，我们开始遵从钟表的命令。
In deciding when to eat, to work, to sleep, to rise, we stopped listening to our senses and started obeying the clock.
他们对其客户的信用评分，信用记录，他们买什么，他们何时买，他们何时有可能拖欠款项等信息了如指掌。
They know their customers' credit scores, credit histories, what they buy, when they buy, and when they are likely to default on their payments.
核糖体找到每个“字母”的适当的氨基酸，并将它们首尾相连，组成一个序列；其他“字母”表示何时开始以及何时停止。
The ribosome finds the appropriate amino acid for each "letter" and assembles them head-to-tail in sequence; other "letters" indicate when to start and when to stop.
要更清晰地了解何时使用扫描程序与何时使用AST 之间的差别，请考虑清单10中的代码。
To see more clearly, this distinction of when you would use a scanner vs. an AST, consider the code in Listing 10.
在财政上变明智的目的是知道何时使用债务以及何时避免使用。
The purpose of getting financially smart is to know when to use debt and when not to.
本节描述何时使用参数标记，何时使用文本。
This section describes when to use parameter markers and when to use literals.
最后，FIT通过确保团队能够立即知道组件何时完成，以及何时错误地中断完成的工作，从而提高了软件的总体质量。
Finally, FIT increases overall software quality by ensuring that the team knows immediately when a component has been completed as well as when completed work has been mistakenly broken.
你们只要，告诉我何时。，何时是第八或第九次。
So you only have to tell me is when... when eight or nine is coming up.
关键是要知道何时该循规蹈矩，何时需破旧立新。
The key is knowing when to follow the rules and when to break them.
其次，了解用户何时联机又何时脱机，这样便可以执行应用程序自动缓存管理以外的任何任务。
The second puzzle piece is knowing when the user goes online or offline so you can perform any tasks not covered by the automatic application cache management.
与上一点类似，红绿灯告诉我们何时该停、何时该行。
Similarly there are traffic lights to tell when to go and when to stop.
更多的规则定义了作用域内存中的对象何时终结，以及何时可以重用内存区域。
More rules define when the objects in a scope memory are finalized and when the memory area can be reused.
例如，如果公司具有您希望终止的特定应用程序的年服务协议，则应了解协议何时期满以及何时续订该协议。
If your company, for example, has an annual service agreement for a particular application that you want to phase out, find out when the agreement expires as well as when it is renewed.
指南说明了何时使用以及何时不该使用专用药品。
The guide provides information on when to use, and also when not to use, specific medicines.
接下来，让我们添加更多的状态来帮助跟踪何时在检查客户以及何时在忙于配送订单。
Now let's add some more states to help us keep track of when we are checking the customer and when we are busy shipping the order.
游戏训练我们的策略：何时攻击、何时避战。
They teach us strategy: when to attack, and when to avoid a fight.
那为什么计算机科学毕业生不能说出何时用SAX何时用DOM呢？
So why can't computer science graduates tell me when to use SAX and when to use DOM?
打开时，它将报告各种JNI事件，比如，本地库何时加载，方法何时弹回；再一次强调，在不同JVM版本中，输出会发生变化。
When turned on, it will report various JNI events, such as when native libraries are loaded and methods are bound; again, the output can vary from one release or JVM to another.
可是，在现实生活中，大多数的人不能简单的辨别出一个人何时在撒谎，何时在说真话。
WASHINGTON -- TV police drama detectives make it look easy but, in reality, most people simply can't tell when someone is lying or telling the truth.
可是，在现实生活中，大多数的人不能简单的辨别出一个人何时在撒谎，何时在说真话。
WASHINGTON -- TV police drama detectives make it look easy but, in reality, most people simply can't tell when someone is lying or telling the truth.
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