principaladj.主要的;首要的n.本金;资本;校长;主角;委托人;主犯
principal tree主树
principal beam主梁
principal note保证期票
principal fund保本基金
principal city未级城市
principal mark主标
principal wife正妻
principal main主干管
principal axisn.[物]主轴
principal part主震相,挚