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Fig. 1.

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Traceback of the VPOS dwarf galaxies with mean proper motion from Li et al. (2021) and Luri et al. (2021) under MW potential model B in a left-handed Galactocentric coordinate frame. The MW is the black line at (0, 0, 0). Red and blue correspond to the positions at the current epoch and at −2 Gyr, respectively. Black and blue ovals indicate the two groups, LMC dwarfs and slow dwarfs, respectively.

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