It was Granovetter who first coined the term "weak-ties", which he used to refer to people's loose acquaintances—in other words, friends-of-friends.

格兰诺威特是第一个造出“弱连接”一词的人，他用此词来指代人们不太亲密的相识——换句话说，就是“朋友的朋友”。