需要通过向shiro提供用户的身份（Principals）和证明（credentials）来判定是否和系统所要求的匹配。 身份（Principals）是Subject的“身.
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Principals' Market 货主间交易期货市场上 ; 交易成员以货主身份在交易圈内和他们的客户一起完成交易
Vice Principals 副校长
Authority of principals 负责人的权利
Security Principals 安全主体
roof with principals 椽木屋顶
School principals 学校校长 ; 校长 ; 任学校校长
Principals Market 货主间交易期货市场上 ; 货主间交易现货沥青市场上
secondary Principals 第二顺位法
multiple principals 多重委托人 ; 委讬人
The role that principals play in principals’ decision-making has no substitute.
校长这一角色在校长决策中具有不可替代性。
参考来源 - 校长决策研究·2,447,543篇论文数据，部分数据来源于NoteExpress
"she sent unruly pupils to see the principal"
同义词： corpus principal sum
同义词： dealer
"the principal rivers of America"; "the principal example"
同义词： chief(a) main(a) primary(a)
以上来源于: WordNet
ADJ Principal means first in order of importance. 最重要的 [ADJ n]
The principal reason for my change of mind is this.
我改变主意的最重要原因就是这个。
...the country's principal source of foreign exchange earnings.
…该国最重要的外汇交易收入来源。
N-COUNT The principal of a school is the person in charge of the school or college. 校长
Donald King is the principal of Dartmouth High School.
唐纳德·金是达特茅斯中学的校长。
N-COUNT The principal of a loan is the original amount of the loan, on which you pay interest. (贷款的) 本金 [商业] [usu sing]
Sixty percent of teachers are women, but a mere five percent of women are principals.
60％的教师是女性，但只有5％的女性是校长。
Once supervised by teachers and principals, they now appear to be in "self care”.
他们曾经受到老师和校长的监督，现在却像是在“自我照顾”。
"We're worried about our teachers and principals, and we really don't want to lose them because of this," one parent said.
“我们很担心我们的老师和校长，我们真的不想因为这个失去他们。”其中一个家长说道。
词组短语
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