upbeat
adjective informal uk/ʌpˈbiːt/ /ˈʌp.biːt/ us/ʌpˈbiːt/ /ˈʌp.biːt/
乐观的;快乐的;积极向上的
full of hope, happiness, and good feelings
Live music and a parade set an upbeat mood for the official opening. 活泼的音乐和队列表演使开幕式的气氛轻松欢快。
Opposite: downbeat