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。
When several stitches fray, the fabric tears.
几个针脚破了，布料就会容易被撕开。
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。
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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