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 point of photograph象主点
principal professionalization校长专业化
principal compoenent analysis大黄
principal part of recognition认识主体
Principal Embarkation Officer登船带队军官(英国)
principal diagonal polynomial主对角多项式
principal vibration direction主变更方向
principal linear optimization最优线性化