在地震层析研究中，常常涉及地震波在非均匀介质中的传播路径问题，故快速射线追踪是不可缺少的工具。
The problem of the seismic wave travel path in the nonhomogeneous medium is often mentioned in seismic sequence analysis by means of rapid ray tracing.
目前，地球内部的仅有数据就是地震波的射线路径；该路径由地球内部不同层圈反射和折射。
At the moment, the only data on the earth's interior are the paths of earthquake waves that are reflected and refracted by the various layers of the planet's interior.
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