过去分词短语用作非限制性定语
过去分词短语有时亦可用作非限制性定语，放在被修饰的名词后面，常用逗号与被修饰词隔开。此时的过去分词作定语只是对被修饰词加以补充说明，关系不紧密，相当于非限制性定语从句。
Some of them, born and brought up in rural villages, had never seen a train. =
Some of them, who were born and brought up in rural villages, had never seen a train.
他们当中有一些人, 生长在农村，从未见过火车。
