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N-COUNT
错觉;谬见;误会
A delusion is a false idea.
例句
I was under the delusion that he intended to marry me.
我误认为他要娶我。
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N-UNCOUNT
妄想;幻想
Delusion is the state of believing things that are not true.
例句
This was not optimism, it was delusion.
这不是乐观,这是妄想。
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PHRASE
妄自尊大;自以为是
If someone has delusions of grandeur, they think and behave as if they are much more important or powerful than they really are.
例句
He suggested that we suffer delusions of grandeur as a football nation.
他暗示我们妄自尊大地以为自己是个足球民族。
...mansions built by men with delusions of grandeur.
自以为是的人建造的豪宅