é??????????¥????????ˉè????o99。9%???
è???¨??????????????????a???0。1%???
??o?°???????????o??????a??????è§?é?¨?¤?è′o?????????è???-¥?£°???
??????è????¥è??è?????è???-¥?£°????¨???????????3a?°′?????1??1?????????
a????????a??????£°???é?¨è¢????????o????
è′o???????????¥è¢?????ˉ1è·a???????|????????£°??????:
a???°±???????o?????????a?o?????¤?????1?è|??????o??¢??a??o??¥???a??
a????????è|??????????è°?????o???????è±1?-?è???????¢è°???3????????????!a??
???è§??¨??????????è′o?????????é????¥é???|???????è?????é?3?1????????????????
a?????????????o?????-?o??a??
????|???????é?£??·????????2????¥1?????????èˉ???????????¥1????o??????????
??′??a?¤§??????é????¥é?????è′o??????????¨????????????a????·±???
???è?3??o?o??¥1??????é????????????-|????ˉ1?????a?¨??¥1????oo???
è′o?????????è?????????¨????????????1?????¨?§ˉ?????¢?o?è?ˉè?3????o2?????o?????2?±¤è°???????
????????????è???????????????o|????¨???????????o????????¥?????????o????????????????????£????ˉ1?3????èˉ′:
a??é?£?°±??????10??¥??§???a??
a??è′o????????ˉ??????????????±????????·?-?????????????????¥??¥?解é????????a???3?????2??o??£°??????è′o??????è??è????-????¨??????????è§?????3a?°′???
a?????????????????????????????????o????a??
è??é¢?????????-?????¥????¨?????????????é????????????1?????????????è??????????′?3a???
??oè′o????????′è?£?????1é?£????¥1?????????è§???????é??è?£?????ˉ??????é?£??????
é??è??????????????????????ˉ?????¥?????£??????