她说成果证实了早期把乐观情绪和长寿联系起来的研究。
She said the study confirmed earlier research that linked optimistic feelings to longer life.
另一项发表在今年心理学杂志上的研究更深入的将笑容和长寿联系起来。
Another study published this year in Psychological Science went further to make a connection between smiles and longevity.
另一项发表在今年心理学杂志上的研究更深入的将笑容和长寿联系起来。
Another study published this year in Psychological Science went further to make a connection between smiles and longevity.
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