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一个叫吉拉德的美国推销员在长期的工作中发现,每位顾客的身后大约有250名亲朋好友,这些人又有同样多的各种关系。他把这一现象命名为“250”定律,并据此认定,
A longtime American salesman named Gillard found that there are about 250 friends and relatives behind each customer who have as many relationships. He named this phenomenon “250 ” law, and accordingly concluded that,