单词	Underground Railroad
释义	Underground Railroad noun variants or less commonly Underground Railway : a system of cooperation among active antislavery people in the U.S. before 1863 by which people escaping enslavement were secretly helped to reach the North or Canada Word History First Known Use 1842, in the meaning defined above
随便看	swainling swainmote swains Swainson pea Swainson's hawk swainsona swainsonae swainsonas SWAK swakaras swale swaled Swaledale swaledales swales swaling swalingly swalings swallet swallets swallo swallow swallow bug swallow dive swallow fish

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