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
They are available in a variety of materials with a range of surface treatments to meet the needs of varying applications.
产品材料多样，可以进行不同程度的表面处理以满足多样应用的需要。
3
Between blazing heat on the star-facing side and freezing cold on the dark side, the average surface temperature may range from minus 31 to minus 12 degrees Celsius, the researchers said.