The social mobility obstacle of unemployment lies in the small scale of social mobility, the strong restraint of the institution, the unreasonable direction and the lag of the concepts.
失业的社会流动阻滞在于社会流动的规模不大、制度约束性太强、方向不太合理和观念滞后。
This paper reviews the basic concepts and principles in mobility management, and the related handoff management and location management is also introduced.
论文介绍了移动性管理的基本概念和基本原理，对移动性管理所涉及到的切换管理和位置管理进行了介绍。
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