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We study continuous $\\mathbb{S}^1$ actions on $X$ and determine the possible fixed point sets up to rational cohomology depending on whether or not $X$ is totally non-homologous to zero in $X_{\\mathbb{S}^1}$ in the Borel fibration $X\\hookrightarrow X_{\\mathbb{S}^1} \\longrightarrow B_{\\mathbb{S}^1}$. 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