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.
就像海浪的波峰，如果它们移动过快，葡萄酒波就开始瓦解，变为泡沫，莱克·拉里说。
Just like an ocean crest, wine waves begin to break, turning frothy, if they're moving too quickly, he says.
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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