What Is Category and Why Should It Be Needed?
什么是范畴？为什么需要范畴？
MySQL has a feature called the query cache that stores the result of a query in memory, should it be needed again.
MySQL有一个特性称为查询缓存，它将（后面会用到的）查询结果保存在内存中。
A purchaser could even be required to agree to return the piece if it should become needed for scientific purposes.
如果出于科学目的需要该作品，买家甚至可能被要求归还作品。
One of them, his nephew, told him that it was pointless to wait in Ajdabiya, that he should go to Benghazi to be with his other son, Yousef, who needed him.
其中一位是他的侄子，对他说，在艾季达比耶等下去是没有意义的，他应给回到班加西另一个儿子身边，这正是约瑟夫需要他的时候。
It should also reduce the degree of monitoring and treatment needed after closure, and allow the site to be put to another use more quickly.
同时降低了填埋场关闭之后续需要监测和处理的程度，使得它能尽快投入其他用途。
It is needed when there should be a specific list of constant values to be used for the simple type defined by the enumeration.
当枚举定义的简单类型使用常数的特殊列表时，就会需要这种类型了。
And if your setup is different, it should be easy to install the core applications needed to run any of these tools.
即使您的系统采用不同的设置，安装运行这些工具所需的核心应用程序应该也很容易。
In practice, this could be hard to achieve, but he has identified one principle. Central Banks' credibility should be focused where it is most needed, on controlling inflation.
实际上，这可能很难做到，但是他指明了一个原则：中央银行的信用要最需要的时候才能用，而不是在控制通货膨胀的时候用。
All users should review this ordering and drag the tasks into the order in which they actually plan to perform the work (it can always be rearranged later as needed).
所有的用户应该评审这个顺序，并将任务拖拉到执行任务时实际规划的顺序上(如有需要以后可以随时排序)。
Again it should be noted that this algorithm was designed as a teaching aid and further refinement is needed it can be used in a production setting.
再次强调这个算法是为了教学目的而设计的，如果要将其运用于产品的构建上那么它还需要进行更多的改进。
Listing 2 shows the code needed to set up the basic layout; it should be self-explanatory.
清单2显示了设置基本布局所需的代码；它应当是自解释的。
This sets expectations for what will go on, gives the meeting structure which can be adjusted as needed, and should make it clear why each person should give up some of their valuable time.
这可以告诉大家会议上要讨论的议题，并给出可以根据实际情况 调整的会议结构，因为要明白无误地告诉大家为什么他们应该花费他们有价值的时间来参加这个会议。
Only 25% think the system works pretty well and requires only minor changes; 40% think fundamental change is needed and 29% think it should be completely rebuilt. Some results are shown in chart 2.
只有25%的人认为该系统运转地很好，只需要做一些不太重要的改变，40%的人则认为该系统需要做出重大的改变，29%的人认为该系统需要被完全重建。
And, since the circuitry needed to run OLED screens has now been developed, it should be reasonably simple to substitute OLEDs with quantum dots.
而且，既然运行有机发光两极管屏幕所必需的电路现在被开发出来，那么它理应能简单地用量子点去代替有机发光两极管。
Because it is relatively shielded from the immune system, only low doses of immunosuppressants should be needed to prevent rejection.
它相对地和免疫系统隔开了，所以只需低剂量的免疫抑制药物应该可以抵抗排斥。
This should be maintained for as long as it is needed.
这种局面应该在必要的时间内尽量保持。
Like green peppers, information you didn't know you needed is good for you, and should be periodically put onto your plate, even if you didn't request it.
有些你不知道的资讯就像绿椒一样，对你是有好处的，也许你不会主动索要，不过自己的碗里最好还是多放点这种东西。
Historic usage patterns and trends allow an IT manager to estimate when resources should be added and how many resources will be needed.
历史使用模式和趋势使IT经理可以估计何时应该添加资源以及需要多少资源。
In practice, it is more important to define the data fields that are needed rather than to decide on whether those fields should be elements or attributes.
实际上，更重要的是定义必要的数据字段，而不是决定这些字段作为元素还是属性。
When a basket is needed it should be automatic that Yao gets the ball.
当需要的时候，球应该自动化式地传给姚明。
There is an alternative approach: generate HTML (and CSS, if needed) and convert it to RTF using PD4ML. NET. HTML code should be less confusing than RTF markup.
有一个替代的方法：生成HTML（和CSS，如果需要的话），将其转换为RTF使用pd4ml.net。HTML代码要比RTF标记减少困惑。
This manual should be kept carefully in a safe place near the UPS, so that it can be consulted by the operator at any time for any information that may be needed regarding correct use of the unit.
本《使用手册》应妥善存放在UPS附近的安全位置，以便操作人员在需要了解有关正确使用UPS的信息时，可以随时参考。
The goal should be to create the best and broadest necessary and permanent infrastructure for the most responsible minimal price needed to build it.
正确的目标应该是以最强烈的责任感并用最经济的造价去投入最好的、最为广泛需要且使用期限久远的基础设施建设。
However, there were many lessons which should be drawn in it and needed deep consideration.
不过，汉代士不遇赋有很多的教训，值得深思。
However, there were many lessons which should be drawn in it and needed deep consideration.
不过，汉代士不遇赋有很多的教训，值得深思。
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