电动旋转变流器
The room -- named after Grand Central's 42nd Street location -- houses a series of rotary converters, which, back in the 1930s, provided the power that electrified the terminal's 63 tracks.
CNN: Memorable moments in Grand Central's 100 years
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。