period of time

英美

时段；一段时间

per prep.每；每一；经过；按照
per cent n.百分之...=percent(美)
per interim 就在这期间；同时
per mu yield 亩产量
per se （固定词组）本身

Noun:

an amount of time;
"a time period of 30 years"
"hastened the period of time of his recovery"
"Picasso's blue period"

1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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。

9. 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。

10. 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。

11. 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。

12. 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。

13. 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。

14. 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。

15. 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。

16. The empty shell of a snail or clam may be left behind, and if it is sufficiently durable and resistant to dissolution, it may remain basically unchanged for a long period of time.: 蜗牛或蛤蜊的空壳可能会被留下来，如果足够持久和抗溶解，它可能会在很长一段时间内基本保持不变。

17. White said his team wanted to see whether living in greener urban areas had a lasting positive effect on people's sense of well-being or whether the effect also disappeared after a period of time.: 怀特说，他的团队想知道生活在绿化较好的城市地区是否会对人们的幸福感产生持久的积极影响，还是说这种影响会在一段时间后就消失。

18. The money was lent for an undefined period of time.: 这笔钱无限期借出。

19. 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。

20. Smoking a lot of cigarettes can harm and even kill over a long period of time.: 长期大量吸烟会危害身体健康，甚至导致死亡。

21. 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。

22. Ebola was so deadly and killed so quickly that within a short period of time, there was no one around to infect.: 埃博拉病毒十分致命，致死速度极快，以至于在短时间内，周围没有健康的人可以再被病毒感染。

23. 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。

24. Occasionally , a sequence of fossil-rich layers of rock permits a comprehensive look at one type of organism over a long period of time.: 偶尔，一个富含化石的岩层序列可以让我们持续并全面地观察一种生物。

25. 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。

26. 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。

27. A flash mob is a group of people who come together suddenly in a public place, do something unusual for a short period of time, and then quickly break up.: 快闪族，是指一群人突然在公共场所聚集，在短时间内做一些不寻常的事情，然后迅速散开。

28. 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。

29. The bar was formed by the mud and sand deposited here over a long period of time.: 河里的泥沙淤积在这里，年深日久便成了沙洲。

30. The reducing candy content in the dextrinization of the dextrin increased and decreased after a period of time.: 糊精在反应过程中的还原糖含量呈现先升高后降低的趋势。

View usage information for a specific time period.
查看特定时段的使用状况信息。
Prime time TV is always the best.
黄金时段的电视总是最好的。
We lived in Beijing for a period of time.
我们曾在北京住过一段时间。
The pre-Christmas period is always very busy.
圣诞节前这一段时间总是很繁忙的。

period of time的相关资料：

【近义词】

period 一段时间
time period 时限

period periodates

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