????:1?????vx:??92?

2?????????

3??????

4????????

5?????

????2?????13??????? ??????????????:??????????????“?????”?????????????

??? ???????????????

???????????20?,????????????????????,??????????????“?????????????”??????

?

????????????,???????????????????“clean”(??)???,????????????14???????????:“????,?,?????,??????”

???????,?????1999????,???????1???????“??????,??(?????)?????????,??????”

???,??????,??????????????:“????????????????????????????”

???????,????????????????????????????????????????????????????,??????:“???,?????????????,???????????????????????????????????????,?????????”

2??????????13??????,????????????????????????73.73????????????? ??????? ??????????? ??

?

???“??????????????????????”???“??????”???????????“?????”,????

“?????????????????,????????????,???????????????,????”??????????????????,?????????“??,???(??????????????)????,??”

?????????,29??????????“??”????????????“????????(??????)??????,????????????,??????”???,????????????,????

“??????????????????,??????????”????????????????????????????,?????,??????,???“???????????????,???????????????????,??????????”

?????????

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

???????????,?,????????????,???????????????,?????,?1????????????????????,?????

“????,????????????????,????????”?????????????,??????????????,??????,?????????????

?????“??????????”??????,??,?????????????,??????“????????????”???“???????????,????????,???????????????‘?????’?????????”

???????????????,??,????????????????,???“??????,???????????????????,?????”(??)

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