Public sense of safety is not only important part of city safety index, but also one key factors of influencing life happiness index of the masses.

公众安全感，是一个城市安全指数的重要组成部分，也是影响群众生活幸福指数的关键因素之一。

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Then, it is of highly significance to explore the psychological factors influencing demo's happiness in current social context.

那么在现有社会背景下，探讨影响民众幸福的心理因素就具有重要的现实意义。

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