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It can also help them decide whether the planet had liquid water.
而且，这可以帮助他们研究火星上到底有没有液态的水。
youdao
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The temperature must be right for water on the planet to remain in liquid form.
而要令水保持液 体状态，就须有合适的气温。
youdao
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The temperature must be right for water on the planet to remain in liquid form.
而要令水保持液 体状态，就须有合适的气温。
youdao