Images of the Martian surface reveal many hundreds of volcanoes.

火星表面的图像显示出了数百座火山。

youdao

Space-probe photographs indicate the existence of giant volcanoes on the Martian surface.

太空探测照片显示火星表面存在巨大的火山。

youdao

As on the Moon, the extent of large impact cratering serves as an age indicator for the Martian surface.

和在月球的一样，大型撞击陨石坑的范围之广可以显示出火星表面的年龄。

youdao

He said the darkening of the Martian surface during some times of the year was caused by the growth of plants.

VOA: special.2010.07.11

Space scientists have collected a wealth of information from spacecraft that have orbited,landed on and dug into the Martian surface.

VOA: special.2010.07.28

Both have traveled across many kilometers of the Martian surface performing experiments along the way.

VOA: special.2010.07.28

It looked like just another dull piece of basalt, so much of which litters the Martian surface.

BBC: Cosmic coincidence on the road to Glenelg

Dry channels on the Martian surface were first spied by Mariner 9 in 1971.

NPR: Radar Reveals Apparent Buried Channels On Mars

This example suggests that water was present 4-5km below the ancient Martian surface, the researchers said.

BBC: Water 'widespread' on early Mars