本系统应用了逐级上溯和标准化子树的概念，综合应用演绎法和合成法进行建树推理。
The system applies the conception of continuously tracing and standard sub-tree, and uses both synthesis and deduction method of FT building.
本文给出了一种新的建树方法，即试错法。
In this paper, we proposed a new tree making method, call...
本文给出了一种新的建树方法，即试错法。
In this paper, we proposed a new tree making method, call...
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