Multi-level principal-agency systems among share holder meeting, board of directors and managers realize the separation between ownership and actual control power.

股东会、董事会、经理层等之间的多重委托—代理制度，实现了所有权和实际控制权的分离。

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So the object of the crime is a complex object, its principal object is the order of government managing medical agency and medical workers and secondary object is public health.

所以，本罪的客体是复杂客体，其中国家医疗机构和医务从业人员的管理秩序是主要客体，公共卫生是次要客体。

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The third part shows the way to establish themodel of principal agency and introduces the principal agency model between Venture Capitalcompany and Venture Capital person particularly.

接下来的第三章介绍了委托代理理论的模型化方法，以及构建风险投资中投资者与风险投资家的委托代理模型；

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"To help support the economic recovery in a context of price stability, the Committee will keep constant the Federal Reserve's holdings of securities at their current level by reinvesting principal payments from agency debt and agency mortgage-backed securities in longer-term Treasury securities, " the FOMC says, adding it will continue to roll over the Federal Reserve's holdings of Treasury securities as they mature.

FORBES: U.S. Economy

The Committee also will continue through the end of the year its program to extend the average maturity of its holdings of securities as announced in June, and it is maintaining its existing policy of reinvesting principal payments from its holdings of agency debt and agency mortgage-backed securities in agency mortgage-backed securities.

FORBES: QE3 Decision: Fed Vows To Buy Bonds Until Economy Recovers (Live Blog)

The Fed said it will also reinvest the principal payments from its holdings of agency debt and agency mortgage-based securities into agency mortgage-backed securities.

FORBES: FOCUS: Fed's 'Twist' Program Likely To Have Little Long Term Impact On Markets