On the basis of test count, the complete C-R-S-N curve is worked out according to the principle of statistics. so as to provide basic data for gear design.

在试验数据的基础上，根据统计学原理，拟合出完整的C - R - S - N曲线，并获得各种可靠度下的弯曲疲劳曲线，从而为国产材料齿轮设计提供了必要的基础数据。

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But according to US government statistics, Afghanistan's dismal rate of infant mortality, a basic indicator of a country's development, has shown no sign of improvement.

NPR: With Vote Looming, Afghans Look for Progress