And then the planet has to have the right surface gravity.
如此以来，这个星球表面就有一定的重力存在。
The pattern is of atmospheric gravity waves playing on the surface of the ocean.
这张图案是在大气重力波对海洋表面所产生的影响。
The surface is perpendicular to gravity.
它们平面垂直于重力。
Messenger's analysis of the surface rock, and of the gravity profile of the core, could help explain.
信使号对岩石层以及核心万有引力的描述和分析或许可以帮助解释。
Mean sea level is an equipotential surface with respect to gravity.
平均海平面就是一个关于重力的等位面。
Based on the basic surface and gravity center concept, the paper presents the surface-digitizing model.
通过引入初始曲面概念，提出了基于物体重心的采样算法模型。
Based on the basic surface and gravity center concept, the paper presents the surface-digitizing model.
通过引入初始曲面概念，提出了基于物体重心的采样算法模型。
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