Sleeping isn't lost time, or just a way to rest when all our important work is done. Instead, it's a critical function, during which your body balances and regulates its vital systems, effecting respiration and regulating everything from circulation to growth and immune response.

睡眠不是浪费时间，或只是完成重要工作后的喘息。相反的，睡眠最主要的功能是维持、调节身体重要系统的平衡。它可以影响你的呼吸、血液循环、人体生长以及免疫反应。