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。
2
It should include the research question, the rationale for the study, the hypothesis (if any), the method and the main findings.
它应该包括研究问题，研究的理论基础，假说(如有的话)，方法以及主要发现。
3
But these two rare cases with damage to the very structure in question allowed De Martino to directly test his hypothesis.