A study of Martian geology is crucial toward revealing clues into the history of the Earth .
研究火星地质对于揭示地球历史演变的蛛丝马迹是十分重要的。
The study of martian geology and comparative planetary geology started late in China , and the foundation is weak .
我国对火星地质和比较行星学的研究起步晚、基础薄弱。