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The K\\\"ahler angle of $\\Sigma$ in $M$ is introduced by Chern-Wolfson \\cite{CW}. Let $(M,\\overline{g}(t))$ evolve along the K\\\"ahler-Ricci flow, and $\\Sigma_t$ in $(M,\\overline{g}(t))$ evolve along the mean curvature flow. 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