Later in the year, two other Earth Explorer missions will launch to study soil moisture and ocean salinity, and ice sheet thickness, respectively.

今年晚些时候，另外两个地球探测项目也将启动，它们分别研究土壤湿度和海水盐度，以及冰盖厚度。

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As samples, the distributions of ice sheet design thickness, compressive strength, flexural strength, shear strength and elastic modulus for ice periods of 25, 50 and 100 years are presented.

作为实例，给出渤海25、50、100年重现期的平整冰层设计厚度分布、压缩强度分布、弯曲强度分布、剪切强度分布和弹性模量分布。

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About 14 million years ago, a period of climate change caused the formation of the Antarctic ice sheet, which averages one mile in thickness and gets up to three miles thick in some parts.

BBC: How Antarctica works