As on the Moon, the extent of large impact cratering serves as an age indicator for the Martian surface.
和在月球的一样，大型撞击陨石坑的范围之广可以显示出火星表面的年龄。
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。
Based on the refractive law of waves, the author presents a mathematical model describing the ejective direction of any particle in cratering.
根据波的折射定律，作者提出了一个描述抛掷漏斗内任意质点抛掷方向的数学模型。
This type of cratering can be extensive over the entire body but is usually concentrated in the area of the seam or flange which contained the entrapped oil.
这类缩孔严重时可以扩散到整个车身，但一般只是在含油污的焊缝或翻边区域。
The experimental study demonstrates that the velocities of particles at free surface are different from those in cratering. Their quantitative relationship is given.
试验研究表明，自由表面速度与内部速度是有区别的，本文给出了二者之间的定量关系。
Failure: Pitting, cratering, or erosion of the surface. Obvious and significant deterioration.
失败：表面出现斑痕、凹或侵蚀，明显且重要的材料损毁。
This article relates the filming mechanics of powder coatings, discusses the influencing factors on the cratering and pinholing defects and gives measures to control the defects.
阐述静电粉末涂料成膜机理，分析了影响粉末涂料缩孔、针孔的因素，并提出控制其产生弊病的工艺措施。
Cratering will generally result from an underground burst, just as for a surface burst.
和地面爆炸类似，地下爆炸通常会产生地面落坑。
His main scientific interest is Comparative Planetary Geology, and in particular Tectonics, Impact Cratering and Astrobiology.
他的科学专长在于比较行星地质学，特别是有关板块运动、陨石碰撞和天文生物学。
His main scientific interest is Comparative Planetary Geology, and in particular Tectonics, Impact Cratering and Astrobiology.
他的科学专长在于比较行星地质学，特别是有关板块运动、陨石碰撞和天文生物学。
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