By dropping out after studying for a period of time, the two students have wasted educational resources, which could have been provided for others.
两名学生学习一段时间后辍学，他们浪费了本可以提供给其他人的教育资源。
Trackers, which are ongoing projects that look at trends or customer satisfaction over a long period of time.
一个正在进行的项目——“追踪者”，在研究很长一段时期内的趋势或客户满意度。
In the case of Facebook, the company says data may hang around until the URL in question is reused, which is usually "after a short period of time", though obviously that time can vary considerably.
以Facebook 为例，该公司表示，在该链接被重用之前，数据可能会一直存在，通常是“在很短的时间之后”，不过很明显，这段时间的长度可能很不确定。
Diabetes is caused by a group of metabolic disorders in which there are high blood sugar levels over a long period of time.
糖尿病是由一组代谢紊乱引起的，代谢紊乱后，血糖水平长期偏高。
We are talking about the Neolithic period here, which was the time before stone tools began to be replaced by tools made of bronze and other metals.
我们这里在说的是新石器时代，是石器开始被青铜和其他金属制工具所取代之前的那个时代。
During this relatively short period of time, greater changes in people's living conditions have occurred than in the thousands of years which preceded.
在这相对短暂的时间里，人们的生活条件发生了比之前几千年更大的变化。
This would typically be where we need the flow to wait for an asynchronous event to occur (which takes a fixed period of time).
这将通常是因为我们需要流等待异步事件发生(需要等待一段固定的时间)。
A monotonically increasing amount of trace data is produced over a period of time, which is written continuously to a text file on the disk.
在一段时间的运行过程中，将不断地产生大量的跟踪数据，并持续地将其写入到磁盘上的文本文件中。
This event could be tied to a sensor event, or it could be a derived event generated after an elapsed period of time in which no tag read events occur.
此事件可以绑定到传感器事件，也可以绑定到没有标签读取事件发生的一段时间后生成的派生事件。
Cell broadcast messages are repeated at intervals over a period of time, which allows an MS to receive the message even if entering the cell after the first transmission.
在一段时间内会不时重复小区广播消息，从而使在第一次发送之后才进入小区的MS也能接收到消息。
Of course you also have to accept that the time period for which it remains unique will be limited.
当然你也必须接受的是，所谓的独具一格也是有时间期限的。
Period The unit of time into which a customer relationship is divided for analysis.
划分客户关系用以分析的时间单位。
The interest rate has units of time, so I have to specify a time period over which I'm measuring an interest rate.
所以，你得为这段时间贴现，除以(1+r)，才是1美元期价的当前值，在这儿我假设的是1年，实际上不必是1年，利率有时间的单位，所以我指定一个时间周期来衡量利率。
As you can see, all aircraft technics refer to 60-70's which is due to the period of time when the building and the laboratory were built.
正如你可以看到，这些飞机的工艺技术都是六七十年代的，这也是实验室建设和成立的时间。
Article 13 labor contracts with a fixed period are the labor contract in which the termination time of the contract has been stipulated by the employer and the worker.
第十三条固定期限劳动合同，是指用人单位与劳动者约定合同终止时间的劳动合同。
There's also a Period which can be used to represent any period of time, like “two years, three months, seven days, four hours, fifty mintues”.
还有一个Period类来表示任意的时间周期，如“两年、3个月、7天、4小时、50分钟”等。
Every year in China, there is always a period of time. During which, all railway stations, long-distance bus stations and airports are extremely busy.
每年都有那么一段时间，全中国的各大火车站长途汽车站、飞机场都会异常忙碌，在外地工作的人们，拖着行李，有的携着年幼的孩子，带着一年收获，迫切地要赶回到家乡、赶到父母的身边，和家人团聚，这段时间里，包含着一个中国人最隆重的节日--春节。
This also provides you with an understanding of the data source, which may be easy or difficult to manage, depending on the form and period of time between updates.
这样还可以帮助您了解数据源；取决于更新的形式和更新之间的时间段，数据源的管理可能非常容易，也可能非常困难。
After obtaining this data, setup a system which allows you to segment and compare your findings over a period of time.
在获取数据之后，安装一个允许你分段和比较在一个周期内发现的系统。
Because blood pressure rises in the heart when you're lying, "which can be life threatening over a prolonged period of time," says Dr. Smith.
因为当你说谎时，心区血压升高，“如果过很长一段时间，这个可以危及生命”，史密斯博士说。
Throughput metrics which track throughput over a period of time.
吞吐量指标，跟踪一段时间内的吞吐量。
Researchers found evidence that grandmasters rely significantly on a vast store of knowledge of game positions, very carefully structured, which has been accumulated over a long period of time.
研究人员发现，有证据表明，大师们非常依赖细致构建的庞大的战局知识储备，这种储备是他们长期累积的结果。
Without any available cohort studies to test exposure over a long period of time, though, they have had to rely on lab studies, which failed to find any clear or reproducible biological effects.
没有任何可用的队列研究，以测试长时间暴露在电磁场中的后果，他们不得不依赖实验室研究，目前未找到任何明确或可复制的生物效应。
However, there is a phenomenon I found that every time a big event or big news happens, editors mailboxes are chock-a-block with the articles which on this topic in a period of time.
然而，我发现了一个现象：每当我们的身边发生了一件新奇的或者重大的社会新闻事件，那么在此后的一段时间内，这类题材的故事作品就会源源不断地从四面八方涌入我们编辑的信箱。
But a cheap stock can become an expensive stock in a very short period of time for a host of reasons, some of which are likely due to speculation by others. Take your gains and move on.
但是一只便宜的股票可能因为很多原因在很短的时间段内就会变得很贵，其中一些原因可能是由于其他投资者的投机行为。
Liu Xiaolu, a Guangzhou Opera spokesman, said: “In a short period of time it has changed the cultural scene here, which was relatively limited until recently. Before it was just Beijing and Shanghai.
广州歌剧院发言人刘小路说：“在短时间内广州歌剧院就已经改变了这儿的文化景观，这在以前是相对受限制的，直到目前才改观。
CUPS allows for the use of printer quotas, which limit the number of printed pages per user per time period.
CUPS允许使用打印机限额来限制每个时间段内每个用户打印的页数。
On top of this, it has an absolute validity period which invalidates its usage after a defined period of time.
除此以外，它还具有绝对有效期，即在定义的时间段之后将会失效。
To provide uninterrupted access to a user's databases while a name change is in progress, there is a period of time in which both the old and new names are allowed access to the systems and databases.
当正在更改名称的时候，为了提供对用户的数据库的连续访问，会有一段时间使用原名称和新名称都可以访问系统和数据库。
To provide uninterrupted access to a user's databases while a name change is in progress, there is a period of time in which both the old and new names are allowed access to the systems and databases.
当正在更改名称的时候，为了提供对用户的数据库的连续访问，会有一段时间使用原名称和新名称都可以访问系统和数据库。
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