图1显示了测试序列中前两个步骤所需的平均时间的总和，即使用解析器构建文档，并遍历文档表示以检查其中的内容。
Figure 1 shows the sums of the average times required for the first two steps in the test sequence, building a document from the parser, and walking the document representation to check the content.
这个简单的函数遍历data(假设data为一个容纳有数字数据的python容器)，计算一组数据的平均值，然后返回值。
This simple function steps through the data (which is assumed to be a Python container holding numerical data), calculates the mean value of the set of data, then returns the value.
第三章研究一类非齐次马氏链的收敛速度及绝对平均强遍历性。
In the third chapter, we study the rate of convergence of nonhomogeneous Markov chains and the absolute average strong ergodic.
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