武汉市城市内部空间结构存在的问题主要有四个方面：第一是建成区用地结构不合理；
There are four problems in urban inner spacial structure in Wuhan. First, the land-using structure in building area in not rational.
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.
利用地震波的信息，研究各向异性介质的物理性质对深入探究地球内部结构有着重要的作用。
It is important to study the physical property of anisotropic media using the information of seismic wave aimed at probing into the earth.
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