Space probes show a body covered with a thick layer of ice.

太空探测器显示了一个覆盖着一层厚厚的冰的物体。

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Satellite observations and submarine surveys over the past few years had shown less ice in the polar region, but the recent measurements show the loss is more pronounced than previously thought.

过去几年的卫星观测和潜艇调查显示，极地地区的冰层减少了，但最近的测量显示，冰层的减少量比之前设想的更为明显。

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Isotopes of carbon in tree rings and beryllium in ice cores show a drop-off in solar radiation during much of the period.

树木年轮的碳同位素和冰核中钚同位素的检测都显示出在上述阶段的大多数时间内太阳辐射能量出现下降。

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