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Huge sections of the ice around the south pole of Mars are melting in this summer's warm weather. 在这个夏日炎热的天气里，火星南极周围的巨大冰面正融化。 The ice cap - made of solid carbon dioxide at temperatures as low as -143 - 'boils' every summer (or, more correctly, 'sublimates' directly from solid form to gas), leaving huge pits in the Martian polar ice. 低至零下142度的气温下，由固体二氧化碳形成的冰冠每个夏天都会“沸腾”（或者更准确地说是从固体直接“升华”成气体），并在火星的极地冰里留下巨大的凹点。 The 'gold' pits isn't likely to be ferried back to Earth, though - scientists remain unsure of the chemical composition of the yelllow, shimmering dust that lines the pit walls every 'summer'. 可是那些在凹点的金线不太可能被带回地球，所以科学家还不能确定这在每个“夏天”都在凹点排成线而且发光的黄色灰尘的化学成分。 Martian summers are rather chilly in comparison to our own - the temperature usually remains below zero degrees centigrade. It's still 'warm' enough, relatively speaking, to make the 'dry ice' of the polar ice caps boil off. 火星的夏天跟我们的相比非常寒冷，气温通常保持在零摄氏度以下。相对将极地的冰冠气化成“干冰”，这样的温度仍然足够“温暖了”。 Part of the fascination of Mars for both scientists and writers has always been how similar the planet's weather is to ours - with seasons, currents, and polar ice caps. Mars has no surface water, however. | 
