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机译:Why intergroup variation matters for understanding behaviour
Univ Calif San Diego, Dept Cognit Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA;
Univ Antwerp, Behav Ecol & Ecophysiol Grp, Dept Biol, Univ Pl 1, B-2610 Antwerp, Belgium;
intergroup variation; chimpanzees; species-typical; behaviour; group differences; culture;