Most galaxy associations are small and have a low densitycontrast.
大多数星系协是小的,密度反衬低。
2
The lateral inhomogeneity and the variation of densitycontrast with depth in the crust and their effects on the inversion of gravity field are discussed.
One of the important geological applications of the gravity method is to trace the boundaries of structures across which gravity anomalies and the densitycontrast differs significantly.