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((Creator：王晶) AND (Funding Organization：The current research program at the Chinese Academy of Sciences was supported by the National Natural Science Foundation of China under 91016005 and 10621202. The work at the Hong Kong Polytechnic University was supported in part by the Central Research grant G-UB50 under the Departmental General Research Fund Scheme. The authors would like to acknowledge G. Yu and C. J. Sung for their helpful discussions, and X. S. Wei, X. N. Lu, and Y. Li for their technical support.) AND (Author：311007-001025)) |
