一首

a piece of

女生

girl student; coed; schoolgirl

唱歌

sing; chant; carol; vocalize; sing a song; vocal; singing; song; vocalization

欢快

lively; cheerful; joyful; cheery; bright; genial; merry; blithe; jolly; jaunty; perky; sprightly; upbeat; cheerfully; joyfully; merrily; blithely; lightheartedly; gaily; cheer; cheerfulness; lilt

清新

fresh; refreshing; crisp; brisk; pristine; sweet; refresh; freshen up; freshen; freshness