Unfortunately, many of the glaciers in the Extreme Ice Survey do not yet have much in the way of historical images.

可惜的是，极地冰川调查(Extreme Ice Survey)中的多数冰河都还没有在历史图像中。

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Therefore, reliability analysis, especially fracture reliability analysis, for the design of fixed production platforms in ice environment or under extreme ice loads is required to be conducted.

因此，冰区固定采油平台的设计以及对服役期平台的评估，均需进行可靠性分析，而且主要是极端冰载作用下断裂的可靠性分析。

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In their model simulations, they artificially removed all Arctic sea ice at the beginning of June for selected years and examined if the ice would recover from such extreme event.

在模拟过程中，他们人为地把特定年份中六月初的所有北极海冰都转移走，观测冰层是否会在那样一场极限事件之后恢复。

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So the photographer launched the Extreme Ice Survey in order to do something that had never been attempted.

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They will trek between nine and 13 miles each day in extreme weather conditions and encounter vast crevasses, moving ice-shelves, glaciers and snow storms.

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