In contrast, Earth grew to its full size 50 to 100 million years after the solar system's birth, via collisions with other small bodies in the solar system.
相反，太阳系形成之后，地球经历了五千万到一亿年，通过无数太阳系里小的星体相互碰撞才有了今天的体积。
Comets are probably the most numerous astronomical bodies in the solar system aside from small meteor fragments and the asteroids.
在太阳系中，除流星小碎块和小行星之外，彗星也许可以说是数量最多的天体了。
Comets are probably the most numerous astronomical bodies in the solar system aside from small meteor fragments and the asteroids.
在太阳系中，除流星小碎块和小行星之外，彗星也许可以说是数量最多的天体了。
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