求翻译：通过总结对比引入了轨迹交叉理论并通过对人、物两个系列的系统研究，探讨发生建筑安全事故的原因，重点对轨迹交叉论的事故模型进行分析。是什么意思？

By summing up the contrast to the introduction of the Crossover theory and by the people, things two series of systematic research to explore the reasons of building security incidents, focusing on the accident model to analyze trajectories cross.

By contrast the track introduced through cross-theory and to people, and two series of systems research, to explore a building safety, with a focus on the cause of the accident to track incidents of cross-theory model for analysis.

Has introduced the path overlapping theory and through to the human, the thing two series system research through the summary contrast, the discussion has the construction security accident reason, key the accident model which discusses alternately to the path carries on the analysis.

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