The Phosphorus cycle has been studied a lot by ecologists because like I said, Phosphorus is an important nutrient and it's not so abundant.

生态学家对磷循环进行了大量研究，因为如我所说，磷是一种重要而不充足的营养物质。

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This drift has been studied extensively in many animals and in biological activities ranging from the hatching of fruit fly eggs to wheel running by squirrels.

在许多动物中，以及在诸如果蝇卵的孵化乃至松鼠跑动的转轮这样的生物活动中，这种变化趋势一直受到广泛的研究。

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The absorption spectrum of 3,5 dinitrosalicylic acid has been studied.

研究了3，5二硝基水杨酸的吸收光谱。

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The FBI has studied how "Top Ten" criminals have been caught over the past twenty years.

VOA: special.2010.05.05

Infant cognition has been something studied for a very long time.

婴儿认知已经得到了多年的研究

耶鲁公开课 - 心理学导论课程节选

The best work on this has been done by Elissa Newport and Sam Supalla who have studied people who have been in the United States for many, many years like 30, 40 years and seeing how well they have come to speak English.

在这方面最佳的研究,是由伊莉萨·纽波特,和萨姆·苏普拉所进行的,他们研究了在美国生活了,三四十年以上的人们,探究了这些人们讲英语的流利程度

耶鲁公开课 - 心理学导论课程节选

It appears that the subject of male attractiveness in friendships has been studied even less.

CNN: Beholding beauty: How it's been studied

This will be the first time it has been studied in a reasonable number of patients.

BBC: Sleep hormone melatonin in Alzheimer's treatment study

Avian flu strains from Indonesia and Vietnam has been studied in the context of mutations so far.

CNN: Bird flu research resumes -- but not in U.S.