一旦得到了 XPath 的实例，就可以开始通过改变上下文、处理名称空间和计算表达式来配置它。
Once you have an instance of XPath, you can start to configure it by changing the context, working with namespaces, and evaluating expressions.
Mac信徒的信仰通过其在推销计算机方面的努力得到了反映和加强。
The faith of Mac devotees is reflected and strengthened by their efforts in promoting their computer of choice.
当待融合数据为两个时，通过理论分析得到了计算融合参数的公式。
Through theoretic analysis, we obtain the formula to calculate the parameters for fusion of two uniform distribution data.
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