primary composition analysis的用法和样例：
例句
- 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。 - Thirdly, taking southern California theme parks cluster as a case, we calculate their niche by principle components analysis utilizing the model.
以美国南加利福尼亚州主题公园群落为研究对象，依据主题公园生态位模型，利用主成分分析法进行生态位测度。
