成功用英语可以翻译为 "success"。这个词来源于拉丁文 "successus"，意思是 "following on" 或 "following after"。例如：

He achieved great success in his career. (他在职业生涯中取得了巨大的成功。)
Success requires hard work and determination. (成功需要努力工作和坚定的决心。)

乐趣用英语可以翻译为 "fun" 或 "pleasure"。这两个词都源自拉丁文，"fun" 来源于 "fūnus"，意思是 "funeral" 或 "burden"，而 "pleasure" 来源于 "placerē"，意思是 "please" 或 "gratify"。例如：

We had a lot of fun at the beach. (我们在海滩玩得很开心。)
It was a pleasure meeting you. (很高兴见到你。)