本文概述了近年来国内外有关学者对地幔内部间断面的认识、采用的研究方法及研究动态。
This paper Outlines the understandings of some scientists about discontinuity surfaces in the mantle interior, research methods and new developments.
弯曲的砖墙、不间断的开口和植被始终跟随我们，穿过内部寻求没有精确界限的流动关系。
The curved brick walls, the uninterrupted openings and the vegetation follow us through towards the inside in a quest for a fluid relationship without precise limits.
用地球的自由振荡研究地球内部结构、速度间断面、密度分布等具有射线理论不可替代的优点。
The earth free oscillation can be used to constrain structure of the earth interior, including velocity, discontinuity as well as density distribution.
应用推荐