文中给出了计算钼丝中心轨迹的新算法，归纳了数控加工程序向图形数据转换的计算公式。
A new algorithm for the calculation of the path of wire is discussed. The formula of transformation from machining programs to graphical data is also given.
根据伤亡事故轨迹交叉理论，事故发生是物的不安全状态和人的不安全行为出现的结果，归纳起来主要是人的因素。
According to the theory of track-cross of casualty accidents, accidents caused by unsafe status of matters and people's unsafe behaviors, which can be summed up people as the main factor.
第三部分，归纳介绍了20世纪英国过失侵权法的大致演变轨迹。
Third part, I want to generalize the general track of the evolution of English tort law of negligence in the 20th century.
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