By using principal component analysis, turfs insect communities can be divided into three types. 经主成分分析，草坪昆虫群落可以分为三个类型。
The main factors with the most influence were urease and uratease activities by The Principal Component Analysis of soil enzymes. 对土壤酶活性进行主成分分析，发现起主要作用的是土壤脲酶和尿酸酶。
