A city of central Pennsylvania on the eastern slopes of the Allegheny Mountains east of Pittsburgh. It was laid out in1849 by the Pennsylvania Railroad as a switching point for locomotives used to cross the mountains. Population, 51, 881.是什么意思_A city of central Pennsylvania on the eastern slopes of the Allegheny Mountains east of Pittsburgh. It was laid out in1849 by the Pennsylvania Railroad as a switching point for locomotives used to cross the mountains. Population, 51, 881.在线翻译_英语_读音_用法_例句