Now a study has found it really does help people nod off if it is milked from a cow at night.

现在一项研究发现，如果是晚上从奶牛身上挤的奶，确实能帮助人们打盹。

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A study has found that educational TV shows come with an added lesson that influences the child's behavior.

一项研究发现，教育类电视节目会额外给孩子们上一课，影响他们的行为。

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A study has found that almost all scientists who produce highly creative work beyond the age of forty entered their fields late.

一项研究发现，几乎所有在40岁以上从事高度创造性工作的科学家进入他们工作领域的时间都较晚。

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In other new research, a study has found that circumcision does not decrease the risk that H.I.V.positive men will infect women.

VOA: special.2009.07.29

A separate study has found that age, gender and where a person has extra body fat may affect the risk of migraine.

VOA: special.2009.03.18

A new study has found the strongest evidence yet that smoke-free laws can reduce a major effect of tobacco smoking - heart disease.

VOA: special.2009.01.07

Alderney's population of gannets could be adversely affected by renewable energy developments, a study has found.

BBC: Les Etac gannetry

Only 9% of directors of the top 250 grossing Hollywood films in 2012 were women, a study has found.

BBC: Women 'struggling' in Hollywood, according to new study

About a third of relatives looking after children because their parents are no longer able to can afford to provide basic items, a study has found.

BBC: Parent walking with two children