古代的哲学家和科学家一致同意牢固的社会关系是幸福的关键。
Ancient philosophers and scientists agree: Strong social ties are a key to happiness.
哲学家和科学家认为，社会关系是幸福的关键。
Philosophers and scientists agree that social bonds are the key to happiness.
哲学家和科学家认为，社会关系是幸福的关键。
Philosophers and scientists agree that social bonds are the key to happiness.
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