These reinforcing effects mean that our social fabric can fray at the edges, like a yarn that comes loose at the end of a crocheted sweater.

这种边缘增强效果说明我们的社交网络边缘是疏松、易磨损的，就像用钩针编制的毛衣尾部松掉的纺线一样。

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When several stitches fray, the fabric tears.

几个针脚破了，布料就会容易被撕开。

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And when most of the stitches fray, the fabric disintegrates.

而当大部分的针脚都破了时，这块布料也就完全解体了。

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Whether or not people are forgiving, they will have noticed that Italy's economy and social fabric have continued to fray, yet the cash to mend it is in ever-shorter supply.

ECONOMIST: Italy's government

If he fails, he will fray not just the fabric of the British economy but also the tempers of the British people.

ECONOMIST: Roads and rail