trilogy
/ˈtrɪlədʒɪ/noun
(pl. -ies)
1- a group of three related novels, plays, films, operas, or albums（小说、戏剧、电影、歌剧、唱片集的）三部曲。
1.1
- (in ancient Greece) a series of three tragedies performed one after the other（古希腊）悲剧三部曲。
- ORIGIN: from Greek trilogia.
1.2
- figurative a group or series of three related things〈喻〉三连串事：
a trilogy of cases reflected this development.
连续发生的三个相关事件反映了事态发展。