地壳上地幔密度不均匀性特征在纵向和横向上都是很明显的。
In the crust and upper mantle, the density is characterized by lateral and vertical heterogeneity.
结果表明，地壳上地幔结构在纵向和横向上具有明显的不均匀性。
The results show that the crust and upper mantle structures present obvious lateral and vertical inhomogeneity.
造成这种现象有多种原因，其中之一是横向上岩性速度变化剧烈。
There are many reasons that cause the phenomena, one of which is acute variety of lithologic velocity in horizon direction.
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