The key external factors that determine happiness include income, work, community and governance, and values and religion.
决定幸福的关键外在因素包括：收入、工作、社区和管理、价值观和宗教信仰。
The personal features that determine happiness include mental health, physical health, family experience, education, and gender and age.
决定幸福的个人特质包括：心理健康、生理健康、家庭经历、教育、性别和年龄。
Sometime there is a two-way interaction between the determinant and happiness itself. For instance health affects happiness and conversely happiness affects health.
有时候，这些决定因素和幸福本身之间存在着一种双向互动。比如说健康会影响幸福感，那么反过来，幸福也让你变得更健康。