????:1????????:?????

2??????v

3???????

4??????200??????

5??????????

????????????9??????????????????????????12???????????????,???75????50????????????,???????????400????

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

?(Bruce Ralston)????,????????????????????????????,???????

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

????(Don Davies)??,?????,???????“???????????”?????????,???????????

????????????????????????“??”???????????50????????????????????????????????

?1974??????(????? ??????????? ?? ???????????)

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