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A good mood or bad mood could be spread among friends, according to a study published in the Royal Society Open Science journal.
一项发表在《皇家学会开放科学》期刊上的研究显示，情绪无论好坏都会在朋友圈里传播。
The research, however, found that the effect is not enough to lead to depression.
不过，这项研究发现，其影响尚不足以致人抑郁。
The study measured social and mood changes over time, providing evidence that mood can spread over social networks in what scientists called "social contagion."
该研究通过测算随着时间的推移社会及情绪的变化，为情绪会在社交网络中传播提供了证据，科学家称之为“社会传染”。
Those with friends who suffer from bad moods were more likely to have bad moods themselves and were subsequently less likely to have improved.
朋友心情不好的人自己也更可能会情绪不佳，且之后也不太可能使情绪得到改善。
Conversely, people with more happy friends were more likely to have improved moods over time.
反之，有更快乐朋友的人一段时间后更可能拥有更好的心情。
"The good news from our work is that following the evidence-based advice for improving mood, like exercise, sleeping well, and managing stress, can help your friends too," said Robert Eyre, the study's lead author and doctoral student at the University of Warwick's Center for Complexity Science.
该研究的第一作者、沃里克大学复杂性科学中心博士生罗伯特·艾尔称：“我们的研究得出的好消息是，遵循言之有据的改善情绪的建议，如运动、睡好觉、调节压力，也对你的朋友有益。”
