Since these carbonates dissolve in acid, the persistence of these mounds indicates that water perhaps less acidic and more favorable for life might have once flowed across Mars.
因为这些碳酸盐能被溶解在酸中，所以这写小丘的存在表明这些没那么酸并且适宜生命存在的水可能在火星流淌。
Since these carbonates dissolve in acid, the persistence of these mounds indicates that water perhaps less acidic and more favorable for life might have once flowed across Mars.
因为这些碳酸盐可以溶解在酸中，这些岩石能长久保存下来就说明在火星上可能曾经流动着酸性并不太大，更适宜生命存在的水。
Also, in surface water, there is a weak acid, carbonic acid, not sulfuric acid, but carbonic acid that helps dissolve the rock.
另外，在地表水中存在一种弱酸，它是碳酸，而不是硫酸，而且是能帮助溶解岩石的碳酸。
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