They may be ancient "beer-making tools", and the earliest direct evidence of beer brewing in China, the researchers reported in the Proceedings of the National Academy of Sciences.

研究人员在《国家科学院院刊》上报告称，它们可能是古代的“酿酒工具”，也是中国酿造啤酒最早的直接证据。

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A new study, just published in the Proceedings of the National Academy of Sciences challenges the rosy picture.

最近发表在《国家科学院院刊》上的一项新研究对这一乐观前景提出了挑战。

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A 2018 study published in the Proceedings of the National Academy of Sciences, for example, followed researchers in the Netherlands.

例如，2018年发表在《美国国家科学院院刊》上的一项研究跟踪调查了荷兰的研究人员。

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The report by a team from the United States and China appears in the Proceedings of the National Academy of Sciences.

VOA: special.2009.10.27

Geographers from three American colleges did a study that will appear in the Proceedings of the National Academy of Sciences.

VOA: special.2010.03.23

A report on the team's discovery was published recently in the Proceedings of the National Academy of Sciences.

VOA: special.2009.05.12

This week, a group of researchers led by Takao Someya of the University of Tokyo announced in the Proceedings of the National Academy of Sciences that they have taken a step towards providing such a covering.

ECONOMIST: Robotics: Dermatology for 'droids | The

In this week's issue of the "Proceedings of the National Academy of Sciences, " FitzGerald has published experiments showing that knocking out a gene in mice might decrease the risk of heart attacks while inhibiting pain.

FORBES: Magazine Article

This week's unusual twist comes in the shape of a paper in Proceedings of the National Academy of Sciences (PNAS), which suggests a very different relationship between two of the major amphibian threats: loss of habitat, and the fungal disease chytridiomycosis.

BBC: Double whammy for the disappearing frogs