不同的幸福理论对此有不同的答案。
Different theories of well-being might answer that in different ways.
它有一个关于幸福本质的很简单的理论。
他们认为，“草原理论”是影响现代人幸福感的根源。
They propose that the 'savannah theory' is at the root of modern happiness.
他们认为，“草原理论”是影响现代人幸福感的根源。
They propose that the 'savannah theory' is at the root of modern happiness.
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