这幅来自NASA火星轨道观察器的图像显示了位于火星南方高地巨大的Hellas撞击盆地北侧地表上的一个大撞击坑。
This observation from NASA's Mars Reconnaissance Orbiter shows the floor of a large impact crater in the southern highlands, north of the giant Hellas impact basin.
科学家将白垩纪末期的大灭绝与地球上的陨石撞击联系起来。
Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth.
这次撞击释放了大量的能量，挖出了一个大约有月球上的第谷陨石坑两倍大的陨石坑。
This impact released an enormous amount of energy, excavating a crater about twice as large as the lunar crater Tycho.
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