One thing is clear: the worst mistake we could make is to spend trillions trying to maintain the unsustainable, to operate as if the next 30 years will be a repeat of the past 30.

• 有一件事是毋庸置疑的：犯的最糟糕的错误花费数兆美元去试图使不可持续的继续运作，这就好像今后的30年会成为过去30年翻版一样，令人沮丧。