然而，火星陨石坑被填满的速度比月球陨石坑快很多。
However, Martian craters get filled in considerably faster than their lunar counterparts.
流星陨石坑是由陨石造成的一个大坑。
寻找被移植的生命体的想法源于对落在地球上的火星陨石的研究。
The idea of looking for transplanted life stemmed from studies of meteorites from Mars that landed on Earth.
碳粒陨星陨石包含大量的有机物，由于它们没被熔化，原来化学成分的大部分仍然完整无缺。
Carbonaceous chondrites meteorites contain abundant organic materials as they have not been melted, and much of their original chemical composition remains intact.
在图森市以北175英里的沙漠中有一个流星陨石坑，这是一个棚车大小的铁在大块到5万年前撞上地球留下的疤痕。
In the desert 175 miles north of Tucson, Meteor Crater is the scar where a boxcar-size hunk of iron slammed into Earth 50,000 years ago.
在图森市以北175英里的沙漠中有一个流星陨石坑，这是一个棚车大小的铁在大块到5万年前撞上地球留下的疤痕。
In the desert 175 miles north of Tucson, Meteor Crater is the scar where a boxcar-size hunk of iron slammed into Earth 50, 000 years ago.
同样的1996年出现在屏幕上的传奇的火星陨石AHL 48001呈现出可疑的证据，在岩石表面有微生物的踪迹。
The same is true for the legendary Mars meteorite AHL 48001 that burst onto the scene in 1996 with suspected evidence it had microbial hitchhikers onboard.
同样的1996年出现在屏幕上的传奇的火星陨石AHL 48001呈现出可疑的证据，在岩石表面有微生物的踪迹。
The same is true for the legendary Mars meteorite AHL 48001 that burst onto the scene in 1996 with suspected evidence it had microbial hitchhikers onboard.
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