“Underground Railway”概念、定义、翻译-科学时代

单词	Underground Railway
释义	历史学词汇手册 Underground Railway （美国）地下铁路（内战前南方奴隶逃往北方自由州或加拿大的秘密路线）
随便看	spacephobia space photogrammetry space photogrammetry space photography space photography space photography space physics space physics space physics exploration space physiological stress space physiology space physiology and medicine space planetary exploration space pointing error space polar coordinate system space potential space power source space probe space probe space probe space propulsion space psychology space psychology spacer spacer

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。