虽然如此，但从2005年十月起双方关系迅速地每况愈下。
Even so, since October 2005 relations have gone downhill fast.
地/月动态关系变化基本归结到地球潮汐，所以我们必须仔细看看他们。
The dynamics of this Earth/Moon relationship come basically down to Earth's tides so we need to take a closer look at them.
结果漂亮的描述了当月亮通过地球阴影时，月地距离和本影截面积的相对大小关系。
The result nicely illustrates the relative size of the umbra's cross section at the distance of the Moon, as well as the Moon's path through the Earth's shadow.
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