But that obvious observation conceals a precise mathematical description: the link between the severity and frequency of conflicts follows a smooth curve, known as a power law.
用一个很简单的数学式，可以表示为：存活率与冲突频率间呈现平实的曲线关系，这被认为是法的力量。
2
Methods Uses the description epidemiology investigation method to the Lijiang infectious disease and measles epidemic reporting data and the observation system data to carry on the analysis.
方法对丽江市传染病及麻疹疫情报告数据和监测系统数据采用描述流行病学调查方法进行分析。
3
Different observer has different results of observation and description.