When geologists first studied the Apollo samples, they found no evidence of water and declared the Moon dry.

当地质学家首次研究了阿波罗样本，他们没有发现月球上有水的证据，并宣布月球事干燥的。

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Experts first studied the connection between air pollution and breast cancer using detailed air pollution maps.

专家们首次使用详细空气污染地图研究了空气污染与乳腺癌之间的关联性。

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This article first studied the rich resources of mulberry and the economic effect in mulberry fibre, the conclusion was optimistic.

文章首先研究了我国桑树的丰富资源和进行桑皮纤维开发的经济效应分析，得出了乐观的结论。

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Scientists first studied the effects of calorie restriction on aging in the nineteen thirties.

VOA: special.2009.09.01

And that person who really studied it systematically, and is given credit for developing the first vaccine, is a Scottish physician named Edward Jenner.

而那个系统研究疫苗,并被誉为发明了第一支疫苗的人,叫爱德华?詹纳,是苏格兰的一名医生

耶鲁公开课 - 生物医学工程探索课程节选

I'm going to go away from studying imperfect competition and go back and visit something we studied almost the first day or maybe the second day, and that election.

我将放下不完全竞争,而是返回去讲我们几乎是第一天,或者是第二天学习的一些内容,就是选举

耶鲁公开课 - 博弈论课程节选

It is only the 41st known Mersenne prime, named after Marin Mersenne , a 17th Century French monk who first studied the rare numbers 300 years ago.

BBC: NEWS | Science/Nature | Largest Prime Number discovered

Centaurus A is the first galaxy to be studied with the Hubble's infrared camera.

BBC: Hubble spies black hole gobbling galaxy

Then, each year after implementing smoking bans (at least for the first three years, the longest period studied), smoke-free communities have an average 26 percent decline in heart attacks, compared with those areas that still allow smokers to light up in public places.

CNN: Big drop in heart attacks after smoking bans, studies say