?? ???????75??50??????????????
????:1?????:????????????
2????????
3??????150????
4?????????????
5?????
?????9???????????13? (????????? ????)“??,??,”??9??????????????12?????????????75????????50??????????????,??????????,“???????????????????????50???????,???????????????,????????????????????????”
???????????????,????????????????????????????????400?????????????
???9???????????12?????????????????????,??????,???????????75??????50????????????(???)????????????(?)??????????? ????????????????? ?????? ???????????,???????????????????????????????????,?????,?:??????????????????
????????????????????,????50??,??????????????(?)??????????????????????????,??????????,???????????????,??????????????????????
???(Bruce Ralston)???????,?????????????????????????,???????????????
?????“??????”?50?????????????????????????????????“???”???,??????????????????????????
?????????????1974?????????(???)
?????????:???