brave new
adjective [ before noun ] uk/ˈbreɪv ˌnjuː/ us/ˈbreɪv ˌnuː/
（尤指前景难以预料的）新的，崭新的
used to refer to something new, especially to suggest that there is some doubt that it can be good or successful
They introduced customers to the brave new world of app-driven marketing. 他们将顾客引入了这种通过应用程序进行市场营销的全新世界。