\begin{document}$\sqrt{s_{NN}}=2.76$\end{document} TeV as examples to show the contribution of different production sources by studying their rapidity densities \begin{document}${\rm d}N/{\rm d}y$\end{document} , yield ratios and transverse momentum ( \begin{document}$p_T$\end{document} ) spectra just after hadronization and at the final kinetic freeze-out. We find that about a half of \begin{document}$d$\end{document} and a fourth of 3He created just after hadronization can survive after the hadronic evolution process. Nucleons from \begin{document}$\Delta$\end{document} resonance decays make a much larger contribution to the regeneration of light nuclei at the hadronic phase stage, and this contribution is about 77% and 90% for \begin{document}$d$\end{document} and 3He, respectively, calculated at the final kinetic freeze-out. In addition, we give an explanation for the constant behaviors of yield ratios \begin{document}$d/p$\end{document} and 3He \begin{document}$/p$\end{document} as a function of the averaged charged multiplicity in Pb-Pb collisions and also provide a possible explanation for the observation that \begin{document}$d/p$\end{document} in Pb-Pb collisions is larger by a factor of about two than in pp collisions at LHC energies."> Different production sources of light nuclei inultra-relativistic heavy-ion collisions -
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