拱心石之州（宾夕法尼亚州的别称）

<美>宾夕法尼亚州(Pennsylvania)的别称

Keystone State───拱心石之州（宾夕法尼亚州的别称）

keystone joists───梯形托梁；

the Keystone State───基石国家

Boston states───波士顿州

keystone joist───梯形托梁；

keystones───n.基础，主旨；基本原则；楔石；拱顶石

emotional state───情绪状态；兴奋状态

meantone system───均音系

personal estate───n.动产（同personalproperty）

Keystone State" ranks 48th in CO2 emissions from fossil fuel combustion, 49th for particulates in the air, and 49th for toxic exposure. ───拱心石之州在化石燃料燃烧产生CO2上排名48，可吸入颗粒排名49，毒素暴露位居49。

Pennsylvania's nickname is the keystone State. Just as a keystone holds together a stone arch, Pennsylvania was seen as holding together the young American republic.───宾夕法尼亚州的别名是“拱心石之州”。就如拱心石支撑起石拱一样，人们认为宾夕法尼亚支撑起了年轻的美利坚共和国。

UGI Utilities, which serves Trimble and homes across the Keystone State, saw a record of more than 5, 500 customers converting to gas in the year that ended in September.───UGI这家为Trimble一家以及宾夕法尼亚州众多家庭提供燃气服务的公司统计，截止到今年九月份有超过5500位用户转向选择了燃气。

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

UGI Utilities, which serves Trimble and homes across the Keystone State, saw a record of more than 5, 500 customers converting to gas in the year that ended in September.

Pennsylvania's nickname is the Keystone State.

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.

The "Keystone State" ranks 48th in CO2 emissions from fossil fuel combustion, 49th for particulates in the air, and 49th for toxic exposure.