It simply defers loading them until they are actually needed.
只是简单地推迟加载它们直到真正需要它们的时候。
Is all the functionality you've planned actually needed?
你计划中的所有功能都是必须的吗？
Instead, the query sits idly by until the data is actually needed.
相反地，查询站点一直闲置，直到真正需要数据时才启动。
Training is conducted at the appropriate time, close to when the skill is actually needed. 5
培训在适当的时候进行，接近实际需要该技能的时候。
After I restored my computer, I could customize it with only the software I actually needed.
我修了电脑后，用唯一真正用得着的软件把它用户化了。
Red UCe functionality and features. Is all the functionality you've planned actually needed?
减少功能和特性。你计划中的所有功能都是必须的吗？
The concept involves pre-allocating a pool of memory and reserving it until it is actually needed.
其思想是预分配一个内存池，并保留到真正需要的时候。
To reduce start-up time and resource usage, it does not load any plug-in until it is actually needed.
为降低启动时间和资源使用，它在实际需要任何插件时才加载该插件。
This is a common pattern: Lazy Instantiation puts off creating the object until it is actually needed.
这是一个常用的模式：延迟实例化，只有当它确实需要的时候才实例化该对象。
Another good question to ask would be whether suppression was actually needed on both the rows and columns.
另一个很好的问题就是是否在行和列上都真正需要suppression。
Consequently a prompt will always be provided whether it is actually needed when the query is executed or not.
因此，不管执行查询时是否需要该表达式，都总是会提供一个提示。
That's right, they actually needed a movie about a giant, man-eating, shark to top Audie Murphy's awesomeness.
没错，他们得用一部讲述巨型吃人鲨鱼的电影才能盖过莫非无敌的冲天牛气。
The package makefile is the important item, provides the steps actually needed to download and compile the package.
该数据包生成文件是重要的项目，它提供了下载和编制这个数据包做需要的步骤。
The concept behind this technique is not creating objects in memory until they're actually needed by the application.
这项技术背后的理念就是直到应用真正使用的时候才在内存中创建对象。
One often doesn't know how to seize opportunities until they are actually needed, at which point it may be too late.
一个人往往到了真正需要机会的时候才知道如何去抓住机会，在此时或许为时已晚。
Firms that manage to load up on credit still suffer because they bear interest costs long before the money is actually needed.
即使那些拿到了巨额信贷的公司也遭受困境，因为他们承受着利息成本，而这笔资金可能要很久才需要。
Explicit and lazy loading enables you to postpone the request for related object data until that data is actually needed.
借助于显式和延迟加载，您可以推迟对于相关对象数据的请求，直到实际需要数据。
That's a possibility in this case, but you probably wouldn't perform this refactoring until you actually needed to re-use this code.
那就有可能是需要重构的原因了，不过除非真的需要重用这部分代码，否则您很可能并不会执行重构。
Have you ever wondered if the update statistics command you are about to run is actually needed since the last time you updated statistics?
自从最近一次更新过统计数据后，您是否想过您将要运行的update statistics命令是否真正必要？
So even if the resource allocation averages out across the year, it doesn't work well for the spike times, when the critical work is actually needed.
因此，就算资源分配每年都是平均的，在确实需要重要工作的关键时刻仍然无法达到很好的效果。
With this approach, however, we still advice against general prefetching if it is not known what prefetched data is actually needed in subsequent requests.
不过，使用此方法时，如果知道在后续请求中将要实际需要哪些预提取数据，我们仍然建议使用普通的预提取功能。
Even worse, some initiatives the company actually needed to support customer changes were denied because their proposals did not sufficiently emphasize the link.
更糟的是，一些公司确实需要的来支持客户的改变需求的主动性工作被否定，因为他们的建议没有最够的强调这一联系。
If CAS is actually needed, it can be enabled on a per application basis in the app.config file setting the runtime/NetFx40_LegacySecurityPolicyenabled flag to true.
如果确实需要CAS，就可以在每个应用程序的app.config文件中，将runtime/NetFx40_LegacySecurityPolicyenabled设置为true即可。
Yet we often find ourselves in situations where, despite spending tremendous time and resources, there's a mismatch between what has been designed and what is actually needed.
然而我们常常在投入了大量的时间和资源后，却发现自己身陷设计方案与实际需要不对称的矛盾之中。
It is actually needed to revamp vacuum furnace and expand its production capacity. The existing problems are introduced and analyzed and the revamping methods are raised.
改造减压炉提高生产能力，这是实际需要。介绍了目前减压炉存在的问题及其分析，提出了改造的方法。
The mission would call into question whether SLS is actually needed for deep space exploration, especially with crewed Orion flights on SLS not beginning until 2021, Muncy said.
该任务将质疑SLS对于深空探测是否实际需要，尤其是SLS猎户座载人飞行一直到2021年还没有开始，Muncy说。
Then ideally you can ship just those classes, rather than precompiling every file in every library (assuming your run touches all files actually needed when the app runs in production.
理想情况下你的应用程序在生产环境中运行时可以只用那些类文件，而不是预编译每个库中的每个文件（假设运行时会用到所有文件）。
And if you actually needed that explanation to get the subtext, you owe your elementary school English teacher a sternly worded note, though you'll probably need some help writing it.
要是你直到现在才搞明白他的言外之意，你应该给你的小学语文老师写个道歉函，当然你很有可能需要人帮才能写出来。
Hades is an open source library that's built on top of JPA and Spring to significantly improve the implementation of data access layers by reducing the effort to the amount that's actually needed.
Hades是一个开源库，基于JPA和Spring构建，通过减少开发工作量显著的改进了数据访问层的实现。
Because you don't actually add content, the authoring template is needed only so that you can create a content object.
因为您不会实际添加内容，所以只需要编写模板就可以创建一个内容对象。
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