The average velocity ratios are very steady, whatever in the long time scale or large spatial scale.
无论是从较长的时间尺度还是从较大的空间范围来看，平均波速比值都是非常稳定的。
The reliability of average velocity ratios relies on the number of stations to satisfy the fitting precision.
平均波速比的可靠性有赖于较多的台站数目，以满足拟合精度的要求。
The reliability of average velocity ratios relies on the number of stations to satisfy the fitting precision.
平均波速比的可靠性有赖于较多的台站数目，以满足拟合精度的要求。
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