Unfortunately, many chronically lonely people think there is little or nothing they can do to improve their condition.

不幸的是，许多长期孤独的人认为对于改善现状，他们无能为力。

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The researchers also found that two groups of genes that help defend against infectious diseases were under-expressed in people who felt chronically lonely.

研究者们还发现，在长期感到孤独的人群身上，两组有助于抵御感染性疾病的基因也作用较小。

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