From the small number of impact craters that appear on Martian lava flows, one can estimate that the planet was volcanically active as recently as a half-billion years ago—and may be active today.
从火星熔岩流上出现的少量陨石坑中，我们可以估计，在5亿年前，这个星球上的火山还很活跃——也许现在依然活跃。
Pyroclastic flows raced down the northern flank of the volcano, leveling trees and destroying buildings in the village of Harris, which was abandoned after soufriere Hills became active in 1995.
火山碎屑沿着山的北坡奔腾而下，铲平了树木，摧毁了哈里斯村(1995年因火山活动被废弃)的房屋。
Lava flows from Pu 'u 'o 'o were active but sluggish Sunday, according to the observatory.
据观测站说，周日，从Pu ' u o ' o流出来的熔岩是活跃的但是流速缓慢。
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