Do things you don 't know how to do and foreswear the routine .

做那些你不知道如何去做的事并且抛弃惯例。

Without their past willingness to foreswear nuclear weapons , that goal would long before now have become a mirage .

要不是它们过去愿意坚决放弃核武器，这项目标早已成为海市蜃楼。