这是必需的所有活性炭纤维项目。
输入查询性能阈值，如果这是必需的。
为了建立到各个db2子系统的连接，这是必需的。
This is needed to establish a connection to the respective DB2 subsystem.
这是必需的，因为perl脚本的输出就是文件的内容！
That's necessary because the output of the Perl script is what goes inside the file!
为了保证泛化和专门化转换能够简单而准确地映射值这是必需的。
This is necessary so that generalizing and specializing transforms can map values simply and accurately.
事实上，整个竞价过程都可被视为嘲讽的儿戏，尽管这是必需的。
In fact, the whole offer for sale could be seen as a cynical, if necessary, charade.
这是必需的，因为易用性是商店中的设备的最终用户的一项重要需求。
This is necessary because ease of use is an important requirement for the ultimate users of the devices in the store.
这是必需的，以便当您动态交换了皮肤，应用程序可以找到所需的样式。
This is required so that when you dynamically swap out the skin, the application can locate the required styles.
这是必需的操作，因为SCVMM无法将具有检查点的虚拟机转换为模板。
This is required as SCVMM cannot convert a virtual machine with checkpoints into a template.
没人说您笨，但是您也不用假想得太多——权衡起来是有点困难，但这是必需的。
You aren't being stupid, but you aren't assuming too much either — a difficult but necessary balance.
这是必需的，因为散列值是对象的地址，并且如果您移动该对象，则需要维护它。
This is required, because the hash value is the address of the object and you need to maintain this if you move the object.
在平常时期，这也是对的：你不应该对政策进行大的变动，除非你很清楚这是必需的。
In normal times, this makes sense: you shouldn't make big changes in policy until it's clear they're needed.
这是必需的，因为如果用户在视图的多个页面之间导航，BinderID将会丢失。
This is necessary because if a user navigates across multiple pages of the view, the BinderID will become lost.
在作为客户来使用WebServiceExplorer测试文件时，这是必需的。
It is needed later to act as the client when we test the file using the Web Service Explorer.
想让大家来你的网站，因为他们确实想要来，提供有趣，搞笑或者有价值的内容，这是必需的。
To have people come to your website because they truly want to, you need to be interesting and provide entertaining or helpful content.
很显然，要装饰你的dock，这是必需的软件--一款优秀的Windows7任务栏的伴侣。
This is, quite simply, a must-have application for tweaking your dock—and an excellent companion for the new dock-like Windows 7 taskbar.
如果你能让他相信这是必需的，你就会得到两全其美的结果：一份固定的收入和跳出固有框框工作的自由。
If you can convince him it's necessary, you'll have the best of both worlds: a regular paycheck and the freedomto work outside the box.
这是必需的，因为用户可能已经向Cart中添加了商品，然后刷新了页面或者导航到其他地方之后又返回来。
This is necessary because the user may have added items to the Cart and then refreshed the page or navigated away and then back again.
这是必需的，能够保护真正的DevelopmentandTestCloud密码；无需将其存储在脚本或明文中。
This is required and protects your real Development and Test Cloud password; no need to store it in scripts or clear text.
这是必需的，这样，在插件停止时，就可以关闭该插件的所有层次结构，并正确删除appender和记录器，如清单5 所示。
This is needed so that when the plug-in stops, it will be possible to shut down all the hierarchies and allow the appenders and loggers to be correctly removed as you can see in Listing 5.
很可能，塑造令人难忘的柯南或者一个经典的未来谋杀战士这是必需的。然而他可能不是PatrickStewart，而Momoa确实拥有一定的表演天赋。
Perhaps that's the only real requirement to make a memorable Conan or a classic future-murdering robot, but, while he may not be Patrick Stewart, Momoa does have some acting talent.
此外，他们说，这是研究人员收集各种观测资料的最佳方式，而这些资料是加快发现或确定大规模趋势所必需的。
Furthermore, they say, it is the best way for researchers to gather the range of observations that are necessary to speed up discoveries or to identify large-scale trends.
如果您是某个层级技术的经理，那么这是您的职责，也是您赖以生存的必需品。
If you are a manager of technology at any level, then this is your responsibility as well as a survival necessity.
这是提高在当今劳动力中发挥生产作用所必需的教育水平的一个主要趋势。
This is one major trend raising the level of education required for a productive role in today's work force.
批评家的知识和训练，更确切地说，是一种认知和情感能力的准备，这是对艺术作品自身独有品质作出适当的个人反馈所必需的。
The critic's knowledge and training are, rather, a preparation of the cognitive and emotional abilities needed for an adequate personal response to an artwork's own particular qualities.
最主要的问题是某些最里面的元素具有一个开始标记，却没有结束标记，而这是xml所必需的。
The major issue is that some of the innermost elements have a start tag but no ending tag, which is required for XML.
这是使您的代码更加灵活的最佳做法，但不是必需的做法。
This is a best practice that makes your code more flexible, but it is not necessary.
系统——或有时称为OS——备份主要创建一个可引导的操作系统结构备份，这是重新构建操作系统所必需的。
A system or sometimes known as an OS backup basically creates a bootable backup of a the operating system structures necessary to rebuild the operating system.
蒲辣秃柳儿虽是个醉汉，但却有着正确清晰的记忆力，这是一个与合法秩序有点冲突的人所必需具备的自卫武器。
Boulatruelle, although intoxicated, had a correct and lucid memory, a defensive arm that is indispensable to any one who is at all in conflict with legal order.
您可以分析查询执行计划输出，以确定这是否是必需的。
You can analyze the query execution plan output to decide whether or not this is necessary.
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