Benefits spread out to three degrees of separation, meaning a better chance at happiness for not only their friends' friends, but also their friends' friends' friends.
这种收益能在“三度分离”范围以内传播。意思就是，如果这个人快乐，那么不仅他朋友的朋友会被传染快乐，他朋友的朋友的朋友也会被传染。
The study also found that loneliness can spread to three degrees of separation.
该研究还发现孤独会有3种不同程度的传染。
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