Researchers at the University of California, San Francisco found that loneliness plays a large role in the decline so often associated with old age.

旧金山加利福尼亚大学的研究员们发现：孤独在与老年人相关的衰老中扮演重要角色。

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Researchers % at the University of California, San Francisco found that loneliness plays a large role in the decline so often associated with old age.

旧金山加利福尼亚大学的研究员们发现：孤独在与老年人相关的衰老中扮演重要角色。

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I suspect that some experts in the field will be keen to address alternative explanations, such as unassessed variables playing a role in the well-being decline.

我怀疑，该领域的一些专家将热衷于作出其他解释，比如在幸福感下降中发挥作用的未评估变量。

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Before getting into specific points I would like to reiterate that my argument is based on a conclusion that is supported by the academic literature: a shift from a domestic economy to a global economy has played a significant role in the decline of unionization.

FORBES: Yes, Unions Need Reinventing

No-one can say for sure what, if any, active role modern humans had in the decline of Europe's Neanderthals.

BBC: Last-stand Neanderthals queried

In fact, with the sharp decline in Russian hard currency earnings, the role of arms, space and nuclear exports has undoubtedly increased in importance as has access to various forms of Western financing.

CENTERFORSECURITYPOLICY: Center For Security Policy