The runners were all injury-free at the time of the study and ran 31miles each week.

在研究期间，所有的跑者每周会跑31公里，并且都没有受伤。

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People need time away from the pressures of study or work to relax and enjoy time with friends and family.

人们需要时间远离学习或工作的压力，放松身心，享受与朋友和家人在一起的时光。

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The author believes the researchers' new study has gone a step further regarding the impact of screen time on well-being.

作者认为，在屏幕时间对健康的影响方面，研究人员的新研究又向前迈进了一步。

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The study found that those who received lower doses of steroids by mouth spent less time in the hospital.

VOA: special.2010.06.23

A cohort study means you take the same group of people and follow them every five years for that period of time.

定群研究意味着你只有一组研究对象,然后在研究期间每五年进行一次记录数据

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it's the study of how languages change over time.

它研究的是语言的历史变化。

我的专业 - SpeakingMax英语口语达人

The NSF report on the study notes that spending the time to study how humans ride and handle bicycles will give designers insight into ways they may improve bicycle design.

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It takes a lot of work and you've got to read and you've got to study all the time.

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The ACTIVE study also tested the time it took to do daily activities, like preparing a meal, and performance tests, such as reading price tables to pick the best telephone provider, Dr. Wolinsky said.

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