the Underground Railroad
/ði ˌʌndəɡraʊnd ˈreɪlrəʊd/
/ði ˌʌndərɡraʊnd ˈreɪlrəʊd/
- a secret system used in the US before the Civil War for helping thousands of enslaved people to escape to the free northern states or Canada. The people trying to escape were called 'passengers', the people who helped them were 'conductors', and the safe houses used for hiding in along the way were called 'stations' .
内战前美国使用的一个秘密系统，用于帮助数千名被奴役的人逃往自由的北部各州或加拿大。试图逃跑的人被称为“乘客”，帮助他们的人被称为“列车员”，沿途用来躲藏的安全屋被称为“车站”。