随着科学家从北极运来更多的沉淀物岩心，波里·亚克及其合作者想了解更多过去冰范围的详细信息，并将此类信息在时间上进一步向后追溯。

As scientists pull more sediment cores from the Arctic, Polyak and his collaborators want to understand more details of the past ice extent and to push this knowledge further back in time.

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波里·亚克和其合作者为美国气候变化科学计划精心准备了论文和报告，他是第一作者。

Polyak is lead author of the paper and a preceding report that he and his coauthors prepared for the U.S. Climate Change Science Program.

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妮可·里奇的波西米亚式优雅已成为她的标志性风格。

Nicole Richie works the Bohemian elegance which has become her signature style.

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