If you talk about the real world, you are referring to the world and life in general, in contrast to a particular person's own life, experience, and ideas, which may seem untypical and unrealistic.
双语例句
例： When they eventually leave the school they will be totally ill-equipped to deal with the real world.
当他们最终离开学校的时候，他们将完全没有准备好应付现实世界。