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。

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.

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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 wellbeing then we should expect any change in that variable to correlate with the observed changes in wellbeing.

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通过静态类型，编译器可以检查参数和变量的值或针对一个给定操作所允许的返回值。

With static typing, the compiler can check the values of arguments, variables, or return values against values allowed for a given operation.

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