极端个人主义的英文：
ultra-egoism

Ultra-individualism; out-and –out egoism
极端个人主义

Combat money worship and extreme individualism (egotism).
反对拜金主义和极端个人主义

They seem to love the land and the people with a sort of fierce egoism.
他们似乎是带著强烈的利己主义来爱这里的人和土地的。

They seemed to love the land and the people with a sort of fierce egoism.
他们似乎是带着强烈的利己主义来爱这里的人和土地的。

She had rightly guessed that Mr. Gryce's egoism was a thirsty soil
她早已察觉到古莱先生自尊心的土壤是贫瘠的。

The perennial conflict between national egoism and international solidarity becomes more and more visible(Isaac Deutscher)See Synonyms at unity
国家利已主义和国际联合之间的长期冲突变得越来越明显(艾萨克·多伊彻)参见

Joel turn down all offer of help he badly needed because of his excessive egoism.
由于极度的自大，乔尔拒绝了所有他极需要的帮助。