savant
noun [ C ] formal uk/ˈsæv.ənt/ us/sævˈɑːnt/
（尤指在其他方面缺乏能力的）博学之士，学者，专家
a person with a high level of knowledge or skill, especially someone who is less able in other ways
There are musical savants who are very awkward physically - until they sit at the piano. 有些音乐专家平时举止显得不自然，但一旦坐在钢琴面前就大不一样。