1. He is under the delusion that he is Napoleon. 他患了妄想症，认为自己是拿破仑。
2. What is the delusion that science is in that is troublesome? 科学所置身其中的、造成了麻烦的错觉是什么呢？
3. He has the tyrant's delusion that "only God", as he puts it, can displace him. 正如他所声称的那样，他有着暴君一样的妄想，”只有上帝”能取代他。
英英解释
n.
1. (psychology) an erroneous belief that is held in the face of evidence to the contrary
2. a mistaken or unfounded opinion or idea
3. the act of deluding; deception by creating illusory ideas
