Earth is a rocky planet where there is liquid water, which is necessary for life to exist.
地球是一个岩石行星，这里有液态水，这是生命存在的必要条件。
Our planet has always harbored water. The rubble that coalesced to form Earth contained trace amounts—tens to hundreds of parts per million—of the stuff.
虽然地球上的岩石或多或少都含有一定量的水，但是科学家认为这些水不足以形成今天的海洋，因此他们将目光转向太空，去寻找海洋的起源。
The planet, referred to as HD85512b, is about 3.5 times the mass of Earth and may be close enough to its primary star to contain water.
这颗编号为HD 85512b的行星是地球质量的3.5倍，离其主恒星距离较近，足以容纳水分。
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