VOA慢速英语:拜登和桑德斯在超级星期二之后展望未来

primary - n. an election in which members of the same political party run against each other for the chance to run in the larger general election

senior - n. an older person

working class - n. the class of people who are working to earn money and who are not rich or powerful

soul - n. the central or most important part of something that makes it effective, valuable, etc.

dignity - n. the quality of being worthy of honor and respect

incredible - adj. difficult or impossible to believe