科学家曾认为从社会整体来看，随着时间的演进，幸福是稳定的。

Scientists had thought happiness is stable over time when looking at entire societies.

youdao

科学家曾认为从社会整体来看，随着时间的演进，幸福是稳定的。

Scientists had thought happiness is stable over time when looking at entire societies.

youdao