在引入平均轨道概念的基础上，提出了一种针对低轨道卫星的过顶与成像区域时间的快速预报算法。

On the basis of mean orbit concept, a fast algorithm for the prediction of LEO satellite passes and image opportunity is presented.

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即使没有区域差异的问题，岩石作为独特的时间标记也是一个难题。

Even without the problem of regional differences, rocks present a difficulty as unique time markers.

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一个解决方案是在这些公共区域建造更多的住所，以减少工作通勤时间。

One solution is to build more accommodation on these public areas to cut down on travel time for work.

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The trouble is, you just don't know when that explosion took place, and since there are several periods in this general area that we're talking about now, in which something big happened, some great change takes place, it turns out different people want to have their explosion at different times.

问题是,你不了解火山爆发的,确切时间以及这种爆发,在这个区域又延续了很多个时期,这些时期发生了许多重大事件和重大变化,结果就是不同人对,火山爆发的时间推测各不相同

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