慢速英语:Sanders Declares Support for Clinton Candidacy

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smile - v. an expression on your face that makes the corners of your mouth turn up and that shows happiness, amusement, pleasure, affection

doubt - n. a feeling of being uncertain or unsure about something

inspire - v. to make someone want to do something

sustained - adj. an effort over a long period of time

bust - n. nothing else will do

platform – n. an official policy statement

poll – n. a public opinion survey or study

endorsement – n. an act of giving one’s approval or support to someone or something