"丰富自己的头脑" 可以用英文表达为 "enrich one's mind" 或 "expand one's knowledge/horizons." 这个表达方法源自英文动词 "enrich," 意思是 "使丰富、使充实," 和名词 "mind," 意思是 "头脑、思想."
下面是一些例句和翻译：
Reading books is a great way to enrich your mind. (阅读书籍是丰富头脑的好方法。)
Travepng to new places can help expand your knowledge of the world. (旅行到新地方可以帮助你拓展对世界的了解。)
Taking a class or learning a new skill can also enrich your mind. (上课或学习新技能也可以丰富头脑。)