"让我们来欢乐"可以用英文表达为"Let's have some fun"或"Let's have a good time"。
这个短语的来源是源自英语中"have fun"这个短语，意思是"玩得开心"或"享受快乐时光"。"have a good time"也有同样的意思。
下面是一些例句：
"It's a beautiful day outside, let's have some fun!" (外面天气很好，让我们来欢乐吧！)
"The party's starting soon, let's have a good time!" (聚会快开始了，让我们来欢乐吧！)
"Let's have some fun and try something new today." (让我们来欢乐吧，今天尝试一些新鲜事物。)