Multi - level threading is a hybrid of user - level and process - based threading.

多级 线程是用户空间和 基于 进程线程的结合.

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User Level security instead of password security.

用户级安全性,而非密码安全.

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However, multiple user - level threads are allowed.

然而, 多用户 线程是允许的.

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All developing work just can carry out on data level and user level.

所有的开发工作只需在管理层和数据层实现.

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