???Ρ???????(RO)????????????Gravity?????????????????????λ????(?????????????????)?????????1???ˉ????????????2(RO2)?????????????????????????????????????ò??????????????á?
??RO????2003??5?????й?????????????????????????????????嵽16????2004??7?￡????°汾 “??????”???У???????????100????????????????й??????????????????
?????RO??????????RO 2?????????????Gravity??????п??????500???????????????????????????????????2011??1?￡?Gravity???????????? 2????ˉ????????δ???κ??????????
??RO2????ˉ10???????Gravity?????????????????????λ????(?????????????????)??????27???????4??????ζ??????????????й????????????????????????????????δ??????
????????????????????????????????????????40407???????40407????????
