Small meteorites have left impact craters all over the planet's surface.这个行星的表面布满了小块陨石留下的撞击坑.One theory about the existence of extraterrestrial life rests on the presence of carbon compounds in meteorites.地球外存在生命的理论...
Thousands of meteorites penetrate Earth's atmosphere and fall harmlessly to the ground each year.每年,几千块陨石穿过地球大气,掉到地面上,并不会造成什么伤害.One theory about the existence of extraterrestrial life rests on the presence of carbon...