This same development is the reason why the principal of a school is not the second in command, but the overall school manager.

同样地，我们可以解释为何中学校长（principal）并非学校里的二把手，他就是学校的总管。

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Debu Panda is a principal product manager of Oracle Application Server development team, where he focuses his efforts on the EJB container and Transaction manager.

Debu Panda是Oracle应用服务开发小组的主要管理者，他的在EJB容器和事务管理上取得过很多成就。

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