We can't go into that today because there isn't time -- it's a broad subject. One thing for sure, in the future there is an essential feature -- necessary, but not sufficient -- which is doing more with less. We've got to be doing things with more efficiency using less energy, less material.
我们今天由于时间关系就无法详说了-- 它是一个广泛的主题。可以确定的一件事是， 未来有一个最根本的特征--必要的，但不是充分方面-- 就是用更少做更多。我们必须做事情 更有效率，使用更少的能源，更少的材料。