upbeat/ˈʌpbi:t; `ʌpˌbit/ n(music 音) unaccented beat, esp at the end of a bar, shown by the conductor's baton moving upwards 上拍; 弱拍. Cf 参看 downbeat. upbeat, adj (fig 比喻) optimistic or cheerful 乐观的; 快乐的.
牛津英汉双解词典