"迷你世界" is a Chinese phrase that means "miniature world" or "miniature universe." To refer to this concept in Engpsh, you could say "miniature world," "miniature universe," or "miniature model of the world." If you are talking about a television show or other media that is specifically called "迷你世界" in Chinese, you could simply refer to it by this name in Engpsh, or you could provide a translation or a brief description of the show to give context. For example, you could say "I'm watching a show called '迷你世界' (translated as 'miniature world')" or "I'm watching a show about a miniature model of the world."