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Especially for the two channels $\\bar{B}^0\\to D^{+}K^-$ and $\\bar{B}_{s}^0\\to D_{s}^{+}\\pi^-$, both of which are free of the weak annihilation contribution, the deviations observed can even reach 4-5$\\sigma$. 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Especially for the two channels $\\bar{B}^0\\to D^{+}K^-$ and $\\bar{B}_{s}^0\\to D_{s}^{+}\\pi^-$, both of which are free of the weak annihilation contribution, the deviations observed can even reach 4-5$\\sigma$. 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