翻译题 46.To confirm the finding, humanity would need to make yet another trip to Mars. "Getting there and acquiring the final evidence that this is indeed a lake will not be an easy task," scientists said. " It will require flying a robot there which is capable of drilling through 1. 5 kilometers [or about 1 mile] of ice, and this will certainly require some technological developments that at the moment are not available. "
Still, the research marks another chapter in the story of water on Mars, which stretches back billions of years ago, when the planet was still young. Back then, Mars was a watery world. The planet was surrounded by a warm, thick atmosphere. Fluffy clouds hung in the sky, and liquid water pooled on the surface, sloshing around in deep craters that sit empty today. Research suggests that Mars may have had enough water to coat a fifth of the planet.