他们整理了早期的数据，并得出新结论：人均收入较高的国家中平均幸福指数也相应较高。
They reproduce the result found with the early data that high-income persons within a country are much happier on average than poor persons.
他们整理了早期的数据，并得出新结论：人均收入较高的国家中平均幸福指数也相应较高。
They reproduce the result found with the early data that high-income persons within a country are much happier on average than poor persons.
应用推荐