principallyadv.主要地principaladj.主要的；首要的n.本金；资本；校长；主角；委托人；主犯principal stress space主应力空间principal automorphism主自同构principal-components主成份分析principal stress ratio主应力比,枝力比principal-agent risk委托代理风险principal stress plane主应力面principal test section主测试段principal normal vector吱线向量principal factor method主因子法,主因素法principally private law私法主导