To create a period time reference, click the time reference drop-down menu and select either Last completed period or Current period.
要想创建时间段引用，应该单击Timereference下拉菜单并选择Lastcompletedperiod或Current period。
All these changes happened over a period of time.
所有这些变化都是在一段时间内发生的。
After training for a period of time, the researchers tested the bees.
经过一段时间的训练后，研究人员对这些蜜蜂进行了测试。
Tribes would stop fighting for a period of time if they found a tree with mistletoe.
如果他们发现一棵树上有槲寄生，部落会停止一段时间的战斗。
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。
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。
One advantage of pitfall traps is that they can be used to collect over a period of time with minimal maintenance and intervention.
陷阱的一个优点是可以在一段时间内用最少的维护和干预进行收集。
In such studies, researchers would need to follow groups of children with and without music lessons over a long period of time—even if the assignments are not completely random.
在此类研究中，研究人员需要在很长一段时间内对上音乐课和未上音乐课的不同小组的儿童进行追踪——即使任务并不是完全随机的。
A whale's muscles and non-vital organs are able to function without oxygen for an extended period of time.
鲸鱼的肌肉和非重要器官能够在长时间缺氧的情况下正常工作。
If you age more slowly over a longer time period, then you are in some sense younger for longer.
如果你在一段较长的时间里衰老得比较慢，那么在某种意义上，你年轻的时间更长。
This crisis might last for a long period of time.
此次危机可能会持续很长一段时间。
She spent a period of time working with people dying of cancer.
她用一段时间帮助即将死于癌症的人们。
I have never seen such a seismic shift in public opinion in such a short period of time.
我从来没有见过公众舆论在这么短的时间内发生如此突然的转变。
The money was lent for an undefined period of time.
这笔钱无限期借出。
Oil or vinegar based salad can be stored for a long period of time without refrigeration.
含油或醋的沙拉可以储存很长一段时间，而且不需要冷藏。
For a long period of time and in many parts of the country, a traveler was a welcome break in an otherwise dull existence.
很长一段时间，在美国的许多地方，旅行者是一种受欢迎的打破沉闷生活的方式。
For a long period of time and in many parts of the country, a traveler was a welcome break in an otherwise dull existence.
很长一段时间，在美国的许多地方，旅行者是一种受欢迎的打破沉闷生活的方式。
In such a life history strategy, the organism suspends any growth, reproduction, or other activities for a period of time so that they may occur at a later, more hospitable time.
在这样的生命史策略中，有机体暂停任何生长、繁殖或其他活动一段时间，以便它们可能在更晚、更适宜生存的时间发生。
One of the things that make the settlement of this size impressive is the time period.
让这个聚居点的规模变得如此惊人的原因之一就是它所处的时代。
They may focus on a certain country or a certain time period when they begin their collections.
当他们开始收集时，他们可能会关注一个特定的国家或特定的时间段。
Insurance can be purchased at a lower rate during the young years, but by buying while young, the premiums are paid in for a longer period of time.
人们可以在年轻时以较低的频率购买保险，不过年轻时开始购保的话，缴纳保险费的时间跨度更长。
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。
When that separation lasts for a period of time, the two populations are able to evolve along different trajectories.
当这种分离持续一段时间后，这两个种群能够沿着不同的轨迹进化。
It peaks in young adulthood, levels out for a period of time, and then generally starts to slowly decline as we age.
它在青年时期达到顶峰，在一段时间内趋于平稳，然后普遍会开始随着年龄的增长而缓慢下降。
To escape the time period, you must complete a series of challenges posted by the elves.
为了逃离时期，你必须完成精灵们发布的一系列挑战。
Other known caves from the same geographical area and time period contain only paintings of plants.
同一地理区域和同一时期的其他已知洞穴中，只有有关植物的绘画。
As you get into his political philosophy, I don't think you've done enough to situate his philosophy within the time period.
在你涉足他的政治哲学这部分时，我认为你还没有充分地把他的哲学和那个时期联系起来理解。
This is the time period in which most scientists formerly believed the area to be inhospitable for humans.
在这段时间里，大多数科学家曾认为该地区不适合人类居住。
During this period of time, I learned a lot and felt a lot.
在这段时间里，我学到了很多，感受到了很多。
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