principal act主要行为principaladj.主要的；首要的n.本金；资本；校长；主角；委托人；主犯Principal Decision Authority主要决策权Principal Naval Store Officer海军补给主任principal axis transformation轴变换,主轴变换principal components analysis主成分分析Principal body for evaluation评估主体Principal Developing Activity主要研制活动principal coordinate analysis主坐标分析principal development program校长培训principal components analytic主成分分析Principal - agency theories委托代理制