????:1???200????:???????????

2????????

3??????

4?????

5?300???????????

?????????2??17?(???????????)???,???16??????????????????????????,???

???????,?,?????????,???,???????,????????????????????????????????????????????,???????????????

  ????????????

“?????????,???????????????,??????????????”??????????????????????(Jonathan Reynolds)???????

?????????????????,??,?????????25%????????????

?????????????????,???????????????,???,???(??????????????)

?????????:???????????????