ldquo_是一个疯子干的,_rdquo_他说,_ldquo_他一定是疯了。_rdquo_的意思是指某人或某事物的行为或言论非常疯狂、荒唐或离谱，常常令人难以理解或接受。

How to pronounce: /ɪz ə ˈɡɪvən frəm æ ˈkrazi pərˈsən/, he said, "He must be crazy."

Usage: 这个短语通常用来形容某人做出的行为或说出的话语十分荒唐、不合理，甚至有些离谱。

Example sentence:

1. She quit her stable job and went on a road trip around the world. ldquo_Is she crazy?rdquo_

她辞掉了稳定的工作，去环游世界。ldquo_她是不是疯了？rdquo_

2. ldquo_Did you hear what he said? He wants to quit school and become a professional skateboarder.rdquo_

ldquo_Yeah, that's just crazy talk.rdquo_

ldquo_你听到他说什么了吗？他想辍学成为职业滑板手。rdquo_

ldquo_啊，那简直就是胡说八道。rdquo_

3. It's ldquo_crazy_rdquo_ to think that we can solve all the world's problems in one day.

认为我们可以在一天内解决世界上所有的问题，那简直就是疯了。

4. The ldquo_crazy_rdquo_ idea of building a roller coaster on of a skyscraper has become a reality.

在摩天大楼顶部建造过山车的疯狂想法已经成为现实。

5. ldquo_I can't believe you jumped off that bridge! You're crazy!rdquo_

ldquo_It was a once-in-a-lifetime experience, and I don't regret it.rdquo_

ldquo_我简直不敢相信你跳下那座桥！你疯了！rdquo_

ldquo_那是一次难得的体验，我不后悔。rdquo_

Synonyms and usage:

1. Insane (adj.): 疯狂的，错乱的。可以用来形容某人或某事物的行为或言论极端、荒唐。

Example: His ldquo_insane_rdquo_ behavior landed him in a mental hospital.

他疯狂的行为让他住进了病院。

2. Absurd (adj.): 荒谬的，荒唐可笑的。可以用来形容某人或某事物说出或做出的话语或行为十分荒谬、不合理。

Example: Her ldquo_absurd_rdquo_ reasoning made everyone in the room laugh.

她荒谬可笑的推理让房间里每个人都笑了。

3. Outrageous (adj.): 离谱的，不可接受的。可以用来形容某人或某事物的行为或言论极端、不合理，令人难以接受。

Example: His ldquo_outrageous_rdquo_ demands were rejected by the company.

他荒唐的要求被公司拒绝了。

Editor's summary:

这个短语常用来形容某人或某事物的行为或言论非常疯狂、荒唐或离谱，常常令人难以理解或接受。它可以与其他形容词如insane、absurd和outrageous搭配使用，强调程度更加夸张。它也可以用来表达惊讶、嘲笑或不满等情绪。