/ˈʌpbi:t ||; ˈʌpˌbit/adj (informal 非正式) positive and enthusiastic; making you feel that the future will be good 乐观的；快乐的；积极向上的: The tone of the speech was upbeat. 这次讲话的语气颇为乐观。The presentation ended on an upbeat note. 演示会以乐观的语调结束。 [OPP]downbeat 反义词为 downbeat