Fortunately, the collision hypothesis is testable.
幸运的是，碰撞假说是可验证的。
One problem with the collision hypothesis is the question of how a satellite formed in this way could have settled into the nearly circular orbit that the Moon has today.
碰撞假说的一个问题是，以这种方式形成的卫星是如何在月球现在的近乎圆形的轨道上运行的。
According to the giant-impact hypothesis, the Moon was created during a collision between Earth and a large object about the size of Mars.
根据“巨型撞击假说”，月球是在地球和一个火星大小的物体相撞时形成的。
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