地穴恶魔的碰撞体积稍微增大。
且他们体积小得多(典型的LED大概就是铅笔顶上橡皮大小),不怕碰撞,并且也许更重要的是它的超级功效。
They also take up much less space (a typical LED is about the size of the rubber on the end of a pencil), are shock resistant and, perhaps most important of all, are extremely energy-efficient.
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。
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.
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