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The measurements present a reversed ratio as $R=\\mathcal B(B_s\\rightarrow \\pi^+K^-)/\\mathcal B(B_s\\rightarrow K^+ K^-)\\sim{4.9/33}$. Therefore, It has been suggested that the transition $B_s\\to K^+K^-$ is dominated by the penguin mechanism, which is proportional to $V_{cb}V^*_{cs}$. 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