Recent orbital images show that water might still occasionally flow on the surface of Mars.
最近的轨道照片显示水仍然偶尔流过火星表面。
For example, evidence is mounting that liquid water may flow underneath the surface of Mars.
比如，越来越多的证据表明火星地表下可能有水流。
For example, evidence is mounting that liquid water may flow underneath the surface of Mars.
比如，越来越多的证据表明火星地表下可能有水流。
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