The key is to change the ocean's local surface temperature, say, by pumping up deep, cold water or using giant plastic tubes to help mix the ocean layers.

关键因素是改变大洋局部的表面温度，通过将底层的冷空气抽到上层或者使用巨大的塑料板，以混合大洋不同深度各层。

youdao

Between blazing heat on the star-facing side and freezing cold on the dark side, the average surface temperature may range from minus 31 to minus 12 degrees Celsius, the researchers said.

研究人员还称，在炽热和寒冷的两个半球之间，该星球平均表面温度为零下31摄氏度至零下12摄氏度。

youdao

It harvests that energy by exploiting the difference in temperature between the warm surface of the sea and its cold depths.

它在海洋暖水层和冷水层之间的温度差中获取能量。

youdao

"In wintertime, the cliff surface gets so cold that its temperature falls below the freezing point of CO2, which at low pressure goes directly to solid, " said Dr Musselwhite.

BBC: Doubts over water on Mars