Perhaps the moon never even had a magma ocean and the rocks were formed another way, they suggested.
他们提出，也许月球甚至从未存在过岩浆海洋或以另一种方式形成的岩石。
They formed an arch, sticking to each other and to the magnets in an interesting pattern and then in even different patterns off the ends of the magnets.
这些小钉子首尾相连形成了一个有趣的弧形连于磁铁上，而在磁铁的两端则以一种不同的方式发散开去。
Not even scientists are completely sure how memories are formed, how we retrieve them or how they disappear.
即使科学家也不完全确定记忆是如何形成的，他们如何被回忆起来，如何消失。
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