main element analysis的用法和樣例：
例句
- By using principal component analysis, turfs insect communities can be divided into three types.
經主成分分析，草坪昆蟲群落可以分為三個類型。 - The main factors with the most influence were urease and uratease activities by The Principal Component Analysis of soil enzymes.
對土壤酶活性進行主成分分析，發現起主要作用的是土壤脲酶和尿酸酶。
