?????:??????,75?????????????,?????????????,?????“???????????????”???????????????????????????!?????????????????,??,??????????????,????????????????????????,????????!

???:???????????? ??“??SN???”

?? ???????????:???,???????????

????:1???SN???:??????????

2?????????

3?51pc·me??

4????95???

5?????

?????:??????,75?????????????,?????????????,?????“???????????????”???????????????????????????!?????????????????,??,??????????????,????????????????????????,????????!

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