伯牙与钟子期是“八拜之交”中的“知音之交”。八拜之交分别指管鲍之交、知音之交、刎颈之交、舍命之交、胶漆之交、鸡黍之交、忘年之交、生死之交。知音之交的意思是知音也谓知己，指非常了解、能赏识自己的知心朋友
Is there a (simple开发者_运维百科) way to return the amount of elements colliding with a single element? Perhaps with jQuery?The HTML DOM doesn\'t give us a clean way of finding all elements colliding
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