Prior to the new study, little was known about the risks of getting directly infected by common respiratory viruses, such as the flu or common cold, on an airplane, the researchers said.

研究人员说，在这项新研究之前，人们对于在飞机上直接感染常见的呼吸道病毒，如流感或普通感冒的风险知之甚少。

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This was during the first deep sleep period, the researchers said.

研究人员说，这发生在第一次深度睡眠期间。

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The researchers said, "An elder would be at risk of poorer diet to keep healthy."

研究人员说：“老人有吃更差的饮食，无法保持健康的风险。”

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The researchers said turmeric has been shown to reduce evidence of damage in the brains of patients with Alzheimer's disease.

VOA: special.2010.06.01

The researchers said the judges could identify some personality traits even when people were pictured in controlled positions.

VOA: special.2009.11.24

The researchers said tPA improved the chances of a successful result by thirty-one percent and produced no change in the death rate.

VOA: special.2009.09.22

The researchers said mistaken identification by eyewitnesses was a leading cause of wrongful convictions.

BBC: Appeal hearing over William Beck robbery conviction

Behaviour like this, the researchers said, show similarities with other types of addictions such as alcoholism.

BBC: NEWS | Technology | US shows signs of net addiction

The researchers said that while figures from the 1950s are not directly comparable they were higher.

BBC: 'No sex please, we're too busy'