megalomania

例句：

1. 1. The patient's behavior was indicative of megalomania.
   患者的举止表明他患有妄想狂。
2. 2.He had a grandiose vision that he would become the richest man in the world.
   他有一幅宏伟的愿景，认为自己将成为世界上最富有的人。
3. 3. Megalomania is a mental disorder characterized by extreme and persistent beliefs in one's own superiority.
   妄想狂是一种精神疾病，特征是极端且持续地相信自己比其他人更优越。