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We consider random walks in strong-mixing random Gibbsian environments in ${\mathbb{Z}}^d$, $d\ge 2$. Based on regeneration arguments, we will first provide an alternative proof of Rassoul-Agha’s conditional law of large numbers (CLLN) for mixing environment ( (2005) 36–44). Then, using coupling techniques, we show that there is at most one nonzero limiting velocity in high dimensions ($d\ge 5$).