And fuel cell constitutes a similar, but the difference is not to use oxygen and oxygen pole.
与燃料电池构成相似，但不同之处是不使用氧极和氧气。
At the South Pole, in a region of continuous darkness, humans could access water to produce hydrogen and oxygen.
月球南极是一个持续黑暗的区域，在这里，人类能够接触到水，以生产氢和氧。
This time, Cassini's instrument had the chance to "smell" that oxygen, as it flew through it over Rhea's north pole, just 97 kilometres above the surface, according to the details given on Space.com.
根据SPACE.com网的报道，这一次，“卡西尼”号探测器在土卫五北极表面97千米高的上空中漫游时有机会一“嗅”其的氧气。
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