Studying such avalanches allows planetary geologists to better understand soil configurations on Mars.
研究如此的雪崩能让行星地理学家较好地了解火星土壤结构。
Gregory wrote a program that analyzed the likelihood that a given planetary configuration would produce the observed astronomical data, then ran it for various possible configurations.
格列格雷编写了一个程序，它可以分析给定的行星组态存在的可能性，并得出天文数据。于是他们进行了不同的排列组合。
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