Because a few dozen of the meteorites that have fallen to Earth come not from the asteroid belt but from Mars.
因为有几十块落入地球的陨石不是来自于小行星带，而是直接来自火星。
It had given them light, brought- them hopes and expectations, and then it had fallen down to the earth, in the mud and among the weeds, lying there for hundreds of years!
它补过天，在天上发过热，闪过光，我们的先祖或许仰望过它，它给了他们光明、向往、憧憬；而它落下来了，在污土里，荒草里，一躺就是几百年了？！
Some question whether life began on Earth at all, asserting instead that it came from a distant world or the heart of a fallen comet or asteroid.
有些理论怀疑生命是否真的起源于地球，他们认为生命并非诞生于地球，而是来源于一个遥远的世界或是某颗陨落到地球上的彗星或小行星的内部。
Below the barges glided downriver in the same stream that carried fallen trees and clumps of earth in the direction of distant Shanghai.
桥下，驳船上装载着砍倒的树木和土堆沿着下游开往远处上海的方向。
Earlier this week, Chandra Wickramasinghe, of Cardiff's Centre for Astrobiology, suggested the Sars virus may even have fallen to Earth from space, but this is not a view widely shared by scientists.
本周早些时候，加的夫天体生物学中心研究员钱德拉·威（ChandraWickramasinghe）暗示了非典病毒甚至有可能来自太空，但是这种观点并不被科学家们所认同。
Several fallen trees and other debris had dammed up the water, and the fast flow during the floods had excavated the soft earth, leaving behind a fairly deep pool beneath the trees.
几棵落木和其他垃圾堆积在一起形成了一个小水坝。河水泛滥时湍急的水流把松软的泥土都冲走了，在树林后面留下一个有点深的水塘。
With fallen leaves buried on the earth every year, the soil becomes richer and richer.
随着落叶每年埋在地里，土壤变得越来越肥沃起来。
Some time, in some age, bodies of men and women had been buried there, houses had stood there, had fallen, and gone back into the earth.
不知什么年代什么年份，男男女女的，死后就埋在这里了；也不知什么年代这里有过房子，塌了后，就全都回归到这大地之中了。
The fifth angel sounded his trumpet, and I saw a star that had fallen from the sky to the earth.
第五位天使吹号，我就看见一个星从天落到地上。
How much rain has fallen on the earth in the past?
过去在地球上究竟下了多少雨？
In the wild, box turtles are often found hibernating beneath the earth, under fallen logs, under rocks, or other areas that might have been used in the past by other animals.
在野外，盒龟经常被发现在地下，被伐倒的圆木下，岩石下或其他可能曾被另一些动物使用过的地方冬眠。
There was an earth-shaking crash, and Fisher and Anderson threw their arms around each other in fright; their car had just fallen back to the ground.
突然的爆裂声让大地震动，斐士与安德森恐惧地抱在一起，他们的车撞回了地面。
There was an earth-shaking crash, and Fisher and Anderson threw their arms around each other in fright; their car had just fallen back to the ground.
突然的爆裂声让大地震动，斐士与安德森恐惧地抱在一起，他们的车撞回了地面。
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