Earth's Ripped Moon Rocky Theorists Propose Collision Large

意群训练： Other theorists propose that the Moon was ripped out of the Earth's rocky mantle by the Earth's collision with another large celestial body after much of the Earth's iron fell to its core .

标志： Other theorists propose that the Moon was ripped /out of the Earth's rocky mantle/ / by the Earth's collision with another large celestial body//after much of the Earth's iron fell to its core./

译文： 其他的理论学家们 认为 ，月亮 /是在地球的大部分铁落入地核后/ /由于与其他大型天体的碰撞/而被 /从地球的岩石状地幔中/撕裂出来的 。

解释： 这个句子虽然还算短，但结构却不简单：句中共有三个介词结构作状语。结构的复杂在本句中给读者带来了真正的阅读困难：月亮、地球、大型天体之间的关系如何？三个事件之间的先后顺序怎样？

另外的一个难点在于，在the Moon was ripped out of the Earth's rocky mantle这段话中，be ripped out of something可以作两种理解。rip既有撕开的意思，又有剥去的意思，而此处的be ripped out of something很容易被读者理解成“被剥夺走某物”的意思。实际上，根据对上下文的理解，这里应该理解成“从某物中撕裂出来”的意思。