The idea that loneliness spreads like a contagion was based on the observation that, over time, scores of loneliness seemed to spread to the edge of a network.

孤独可以像传染病一样传播的观点建立在这一观察基础之上：长期的观察发现许多孤独感似乎扩散到了这一网络的边缘。

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The bears continue to cling to the idea that the European debt mess is going to evolve into a crisis of debt contagion and bring down the global economy in the process.

FORBES: Markets Advance Following ECB Bond Purchases