translation.en: Dopamine plays a number of important functions in the brain, including in attention, arousal, reward, and disorders of the dopamine system have been linked to a number of mental disorders including drug abuse, Parkinson's disease, and ADHD.
translation.zh: 多巴胺负责大脑里一些重要的功能， 包括注意力，觉醒，激励， 并且多巴胺系统的紊乱已经被联系到 一些精神方面的紊乱，包括药物滥用， 帕金森氏症和多动症。