adj.夜的，夜间的；（动物）夜间活动的；（植物）夜间开花的；[乐]夜曲的 英英释义： nocturnal[ nɔk'tə:nəl ]adj.belonging to or active during the night"nocturnal animals are active at night"; "nocturnal plants have flowers that open at night and close by day"of or relating to or occurring in the