egotist和egoist的区别是：egoist 利己主义者，egotist自大的人。
Your attitude for life is simple, direct, and aboveboard—every decision you make is based on the answer to one question: “What’s in it for me?”
你的生活态度很简单，直接，坦率，你所做的每一个决定，都基于“对我有什么好处？”这个问题的答案。
If your selfishness, greed, and ruthless desire for self-advancement hurt other people, that’s too bad.?
如果你是一个自私的，贪婪的人，为了自己的利益不惜伤害别人，那就太坏了。
“This is a tough world, pal, dog eat dog and all that, and I, for one, am not going to be left behind”.
“这个世界太凶残了，兄弟们，残酷的竞争，自相残杀，我呢，作为其中一员，自然不能落后！”
the height of conceit
“Now, Let’s see. Have you heard about all the money I’m making? Did I tell you about my latest amorous conquest? Let me give you my opinion—I know, because I’m an expert at practically everything!”?
“你听说过我赚的那些钱么？我跟你说过我最近俘获的情人咩？让我给你点建议吧，因为我几乎什么事情都是专家啊！”
You are boastful to the point of being obnoxious—you have only one string to your conversational violin, namely, yourself.
你吹的有点过了，已经到了令人讨厌的地步，要是把你的对话比作小提琴，你那琴上就只有一根弦，也就是你自己。
And on it you play a number of monotonous variations: what you think, what you have done, how good you are, how you would solve the problems of the world, etc. ad nauseam.
你还用它弹了那么多单调的变奏曲，你所想所做，你多好，你如何拯救世界，等等，令人作呕。
以上内容参考：英语词典-egotist