white hope
noun [ S ] uk/ˌwaɪt ˈhəʊp/ us/ˌwaɪt ˈhoʊp/
UK被寄予厚望的人（或事物）
a person or thing that people hope will be very successful in the near future
This new car is seen as the great white hope of the industry. 这款新车被该行业寄予厚望。
US（尤其在过去，被寄予厚望在拳击或篮球等比赛中胜过黑人或西班牙裔人的）白人
used, especially in the past to refer to a white person who is expected to be more successful than a black or Hispanic person, for example a boxer or basketball player