The study period covered the past 20 years.

该研究涵盖了过去20年。

And when the study period ended, their energy use shot back up.

当这个研究结束后，他们的能源使用突然就恢复常态了。

Over the study period, that number increased from less than half to over 60 percent.

在研究期间，这一比例从不足50%上升到60%以上。

During the study period, the most water was redistributed in western North America and northwestern India.

在研究期间，大部分水被重新分配到北美西部和印度西北部。

For example, the researchers only measured women's movements once, at the start of the study period.

例如，研究人员只在研究开始时测量了女性的单次行走。

That translates to 30 additional deaths and injuries in those California zip-codes, during the decadelong study period.

这样一来，在长达十年的研究中，这些加州社区的伤亡人数上升了30%。

Many of those questioned had a usual way of getting to work that remained unchanged during the study period.

许多接受调查的人在研究期间的上班方式都保持不变。

The more beverages containing added sugar that people drink, the greater their risk of death was during the study period.

在研究期间，人们喝的含添加糖的饮料越多，他们的死亡风险就越大。

That is, people who felt their life had purpose were less likely to die during the study period from any cause.

也就是说，那些认为自己的生活有目的的人在研究期间不太可能因任何原因死亡。

The study had a few limitations. For example, the researchers only measured women's movements once, at the start of the study period.

该研究有一定的局限性。例如，研究人员只在研究开始时测量了女性的单次行走。

Third, fill in your schedule with personal study periods.

第三，用个人学习时间填写你的时间表。

My personal preference is for several short study periods a week.

我个人的偏好是每周有几个短暂的学习时间。

The large increase in the humpback population during the study period provided valuable data about changes in the animals' behavior, said Simon Ingram.

西蒙·英格拉姆说，在研究期间座头鲸数量的大幅增加为研究动物行为的变化提供了有价值的数据。

We had these men and women doing over the 12-week study period and they were doing each form of those exercises one day a week.

我们让这些男性和女性在为期 12 周的研究期间进行锻炼他们每周做一天这些锻炼的每种形式。

At the end of the study period, there was a correlation between the group that expressed gratitude and the heightened sense of mental and physical well-being.

研究结束时，表达感激的那一组人的精神和身体状况都有所改善。

At the end of the 12-week study period, the comedy group improved by 10% in a test measuring how much oxygen their heart could pump around the body.

在长达12周的研究结束时，科学家对他们的身体进行检查后发现，观看喜剧的小组成员心脏供应全身的氧气流量增加了10%。

In addition, there was an increase in statin use by people with diabetes. Over the study period, that number increased from less than half to over 60 percent.

此外，糖尿病患者对他汀类药物的使用也有所增加。在研究期间，这一比例从不足半数上升至60%以上。

10. Make a plan -- and stick to it Many students know they should space out study periods, quiz themselves and practice other good skills.

10. 制定计划并坚持执行 许多学生知道他们应该间隔学习时间、自我测验并练习其他良好技能。

Still, among the more than 333,000 people in the study, light and moderate drinkers were 20% less likely to die from any cause during the study period compared with their completely abstemious peers.

尽管如此，在接受研究的33.3万人中，轻度和中度饮酒者在研究期间死于任何原因的可能性也比完全不喝酒的同龄人低20％。

A 2013 study of more than 1500 people with coronary heart disease even found that those with a greater purpose in life were less likely to have a heart attack during the two-year study period.

2013 年对 1500 多名冠心病患者进行的一项研究甚至发现，在为期两年的研究期间，那些生活目标更高的人不太可能出现心脏病发作。