VOA慢速英语:美国著名民权运动领袖约翰·刘易斯逝世

sharecropper -n. a farmer especially in the southern U.S. who raises crops for the owner of a piece of land and is paid a portion of the money from the sale of the crops

conscience -n. the part of the mind that makes you aware of your actions as being either morally right or wrong

segregated -adj. divided in facilities or administered separately for members of different groups or races

despair -n. the feeling of no longer having any hope

optimistic -adj.having or showing hope for the future: expecting good things to happen