So Tomasello's Max Planck colleague primatologist Christophe Boesch looked for evidence of altruism in the wild.
所以，托马塞洛在麦克斯·普朗克的同事，灵长类动物学家克里斯托夫·伯施，就开始了在野外需找证据。
Boesch says altruism may not show up as often in captivity because captive animals don't need to stick together to survive.
伯施说，利他主义行为在圈养环境下发生的并不那么频繁，因为圈养动物不需要只有抱成团才能生存下去。
Boesch says altruism may not show up as often in captivity because captive animals don't need to stick together to survive.
伯施说，利他主义行为在圈养环境下发生的并不那么频繁，因为圈养动物不需要只有抱成团才能生存下去。
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