Warmer temperatures are believed to have helped create the lake by melting surface snow, but a cold snap may have frozen its natural drainage routes.

据信，天气变暖造成了表面冰层融化，但随后的冷空气冻结了冰水自然流淌的路线。

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New casting technologies including fluxless melting and nonchromated anodisation surface treatments are emphasised.

重点介绍了新的铸造技术，包括无熔剂熔炼和非铬化阳极处理。

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Some of these properties appear to be evident in this iceberg, though the channel may have since been widened and enlarged by the subsequent tidal and surface melting and erosion.

虽然后来的潮汐和表面的融化与侵蚀可能加宽并扩大了这个河道，但是其中一些属性似乎在这个冰山上表现的很明显。

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Greenland's surface layer vaulted into the news in summer 2012 when higher than normal temperatures caused surface melting across about 97 percent of the ice sheet.

ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)

About half of the route is across permafrost, which poses particular challenges because of the danger of subsidence caused by melting at the surface in summer.

ECONOMIST: Tibet: High train | The

Discovery of volcanic ice flows and melting of ice on the surface of Europa that support the premise of liquid oceans underneath.

CNN: Galileo moves on to Europa