idiot savant
noun (from French)a person who has severe learning difficulties, but who has an unusually high level of ability in a particular skill, for example in art or music, or in remembering things 弱能特才,低能特才(有严重的学习障碍,但在艺术、音乐或记忆等方面有超常能力) Word OriginFrench, literally ‘knowledgeable idiot’.