【實用生活app】Key To Happiness|最夯免費app-綠色工廠好玩App

Happiness is a mental or emotional state of well-being characterized by positive or pleasant emotions ranging from contentment to intense joy. A variety of biological, psychological, religious, and philosophical approaches have striven to define happiness and identify its sources. Various research groups, including positive psychology, endeavor to apply the scientific method to answer questions about what "happiness" is, and how it might be attained.

It is of such fundamental importance to the human condition that "life, liberty and the pursuit of happiness" were deemed to be unalienable rights by the United States Declaration of Independence.

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