First, they explain that if a given variable is playing a role in affecting wellbeing then we should expect any change in that variable to correlate with the observed changes in wellbeing.
首先，他们解释说，如果一个给定的变量在影响幸福感方面发挥了作用，那么我们应该预期该变量的任何变化都与所观察到的幸福感变化相关。
First, they explain that if a given variable is playing a role in affecting well-being, then we should expect any change in that variable to correlate with the observed changes in well-being.
首先，他们解释说，如果一个给定的变量对幸福感有影响，那么我们应该认为该变量的任何变化都与观察到的幸福感变化相关。
Nowadays service industry is playing a more and more important role, so much concern is given to the management of services.
随着服务经济时代的来临，服务业开始扮演越来越重要的角色，服务管理理论研究也迅速走向前沿；
Nowadays service industry is playing a more and more important role, so much concern is given to the management of services.
随着服务经济时代的来临，服务业开始扮演越来越重要的角色，服务管理理论研究也迅速走向前沿；
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