多樣化是對(duì)無知的對(duì)沖。
We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.
The Tesla Roadster… it’s a two-seater sports car， very high performance…In fact， it’s beat any Ferrari or Aston Martin in acceleration.And it has more than twice the energy efficiency of a Prius.