So, what evidence of a liquid water environment did we find in rock samples taking from the oldest rocks on Earth?

那么，在从地球上最古老的岩石中提取的岩石样本中，我们发现了什么液态水环境的证据呢？

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Round the world he went, to Nigeria, Australia, the Arctic, India, taking thousands of blood samples, hoping something would show up.

他到了世界各地，到了尼日利亚，澳大利亚，北极，印度，采集了成千上万的血液样本，希望能研究出什么来。

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Researchers took blood samples from 16 beginners taking their first week of yoga classes.

研究者们对第一个星期参加瑜珈班的16位初学者身上取得血样。

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Inside the Preston Robert Tisch Brain Tumor Center, Karen waits patiently as a parade of doctors and technicians pokes and prods, taking samples of all kinds.

CNN: Vaccine may shift odds against deadly brain cancer

Greenpeace's solicitor Razi Mireskandari told Mr Justice Morland at the High Court that in the last few days of its campaign, Greenpeace made an error in taking samples of oil from the Brent Spar.

BBC: apologises to Greenpeace

There was overwhelming support for the idea of police taking DNA samples from people charged with sex offences or murder, but less than half wanted samples taken from people convicted of drink-driving or shop-lifting.

BBC: Genetic data 'insurance fear'