Trial ray method is an effective one for solving two point ray tracing. This method is efficient and simple.

试射法是求解两点射线追踪问题的一种方法，它的解法快速简便，易于判断和识别。

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A rapid and accurate method for two point ray tracing in horizontally layered velocity model is presented in this paper.

提出了一种快速准确的水平层状介质中两点间的射线追踪方法。

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Based on Fermat's principle, the paper USES full-path iterative algorithm to realize 3-d VSP two-point ray tracing in volume element model.

本文基于费马原理，利用全路径迭代算法实现体元模型中的三维VSP两点射线追踪。

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Part of the trouble, Mr Settersten and Ms Ray point out, is that in the absence of reliable public schools, parents must play a big role in the academic careers of their children.

ECONOMIST: It��s tougher than it appears for the millennial generation

Fusa Miyake discovered Carbon-14 and Beryllium-10 traces in tree rings from the era, which point to a gamma ray burst from a celestial body other than the Sun.

ENGADGET: Alt-week 1.26.13: quadruple DNA helixes, Byzantine mutants and battling hospital bugs

"Up to this point, the category has not performed to expectations, but manufacturers sense the urgency, and are making sure that they lower prices to the point that Blu-ray players will become irresistible to consumers this holiday season, " said Bruce Tripido, a vice president of marketing at Sharp Electronics Corp.

WSJ: Retailers Slash Blu-Ray Player Prices