本文介绍了近十年来研究地球内部结构的三维地震反演方法及其进展，重点放在对地震体波反演方法上。
This paper gives a description of three-dimensional method for studying structure of the earth's interior and its recent progress, putting emphasis on the inversion method of seismic body waves.
在你们的线性三维时空中，它只有一个石头的结构，和其它“人造”的结构一样坚固地附着在地球上。
In your linear 3d space - time there appears to be only stone structures, fixed and adhered to the earth in the way of any other 'man-made' structure.
二是反演地球内部结构，主要是三维密度的不均匀分布，并对诸如地慢对流等作约束；
The second application lies in the earth's interior structure. The gravity fields can provide constraints for three-…
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