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 problem of dynamics动力学知问题principal of prior scheduling优先调度法则principal of getting together社会化交互模型principal hmction of teachers教师主体性principal ingredient analysis主成分分析Principal comnonents analysis主分量分析Principal oscillation pattern主振荡型principally quasi-injective主拟内射Principal Subordinate Command主要下属司令部(北约)principal industrial products主要工业产品