Other risk factors for a silent stroke are high blood pressure, heart disease,diabetes and tobacco use.

VOA: special.2009.08.12

They use food frequency questionnaires, which I mentioned before, surveys, and then biological markers like blood tests of certain things to see how diet is related to health.

研究员还运用食物频率调查表,我之前曾提到过,各类调查以及生物标志物,像是血液检测等手段,来研究饮食与健康之间的关系

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There are services now, we don't know yet how to get those stem cells out of cord blood and how to use them for therapies, but it's reasonable to think that we might know about this in 30 years.

现在已经有提供这样的服务了,我们现在还不知道如何从脐带血中,提取这些干细胞并用于治疗,但有理由相信,在未来的30年内我们会知道的

耶鲁公开课 - 生物医学工程探索课程节选

But she says in a real lab, experts would use pig blood to conduct their tests.

VOA: special.2010.05.05

Doctors can also use catheters to open blocked arteries that supply blood to the heart.

VOA: special.2010.02.17

The first involves sheep. Researchers have found that hair sheep are a good source of blood for use in tests to diagnose infectious diseases in people.

VOA: special.2009.08.03

So tests often use human blood instead.

VOA: special.2009.08.03