The surface of Mars shows a wide range of geologic features, including huge volcanoes—the largest known in the solar system—and extensive impact cratering.
火星表面显示出广泛的地质特征，包括巨大的火山——太阳系中已知的最大的火山——和广阔的撞击坑。
2
The appraising range, complex degree of geological environment, classifiable standard in appraising geologic hazards and its importance are expounded in this paper.
阐述评估范围、地质环境条件复杂程度、地质灾害危险性在评估工作中的划分标准及其重要性。
3
According to solution of optimal model, geologic reserves and water influx value can be obtained directly, and water range and water invasion coefficient can also be determined.