求翻译：地下铁路是由废奴主义者建立的，通过隐蔽的方式，经由秘密的路线和食宿站，指引和协助大批黑人奴隶逃离南方。南北战争爆发之前，估计至少有6万人因此获得自由，“地下铁道”的著名组织者之一，H．塔布曼是女奴出身；是什么意思？

MTR is established by the abolitionists, through covert means, through secret routes and accommodation stations, guidance and assistance to a large number of black slaves fleeing the South. Before the outbreak of the Civil War, estimated that at least 6 million people to be free, "underground railro

Mass Transit Railway (MTR) is established by the abolitionist, through covert manner, through secret routes and accommodation site, the guidelines and assist large numbers fled South African slaves. north-south prior to the outbreak of war, it is estimated that there are at least 60,000 people are a

The underground railway is by the waste slave principle establishment south, through the covert way, by way of the secret route and the board and lodging station, the direction and the assistance large quantities of black slave flees.Before Civil War eruption, estimated has 60,000 people at least th

Mass transit railway was founded by abolitionists who, through the subtle way, through a secret route and accommodation to guide and assist a large number of black slaves fleeing the South. South before war, estimates were free at least 60,000 people that "Metro" famous one Organizer, h. Harriet Tub

Mass transit railway was founded by abolitionists who, through the subtle way, through a secret route and accommodation to guide and assist a large number of black slaves fleeing the South. Before the outbreak of the civil war, estimated that at least 60,000 people to be free, "underground railroad"