a number of metal rings that are connected together and attached to a larger ring, and often also to a decorative object, used for keeping your keys together

They sell $1 trinkets, such as key chains, on New York's streets. 他们在纽约街头卖钥匙链这样的一美元小饰品。

He carries his new apartment keys on a key chain that reads "Don't Mess with Texas 他把新公寓的钥匙挂在写着 "别惹德州 "字样的钥匙链上。