Most galaxy associations are small and have a low density contrast.
大多数星系协是小的，密度反衬低。
The lateral inhomogeneity and the variation of density contrast with depth in the crust and their effects on the inversion of gravity field are discussed.
本文讨论利用重力资料反演莫霍面时，地壳横向不均一性，密度随深度变化以及异常数据滑动平均处理对解释结果的影响程度。
One of the important geological applications of the gravity method is to trace the boundaries of structures across which gravity anomalies and the density contrast differs significantly.
重力方法重要的地质应用之一是主要根据重力异常及密度变化追踪构造的边界。
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