单词Keystone State
na.: 宾夕法尼亚州的浑名
网络: 基石州；拱心石之州；磐石之州
宾夕法尼亚州的浑名
基石州
Of the 956 workers who died in coal-mining accidents in the U. S. in 1891, for example, more than two-thirds perished in the Keystone State.
以1981年为例，那一年全美共有856名工人死于煤矿事故，仅宾州煤矿就占了三分之二还多。
Monsters of Pennsylvania: Mysterious Creatures in the Keystone State
宾夕法尼亚怪物：拱顶石州的神秘生物
Pennsylvania - Keystone State, Quaker State
宾夕法尼亚州里程碑州
Keystone State Independence State Quaker State
拱心石州