If people or their opinions are upbeat, they are cheerful and hopeful about a situation.
例句
The Defense Secretary gave an upbeat assessment of the war so far...国防部长对目前的战事给予了乐观的评价。Neil's colleagues say he was actually in a joking, upbeat mood...内尔的同事们说他实际上在说笑逗乐,心情不错。
N-COUNT
弱拍;上拍
In music, the upbeat is the beat before the first beat of the bar.
英英词典释义
Noun
1. a contented state of being happy and healthy and prosperous;
"the town was finally on the upbeat after our recent troubles"
2. an unaccented beat (especially the last beat of a measure)