Young animals play in order to get really good at certain specific things they will need to do when they are adults, like chasing, pouncing, climbing.
幼兽玩耍以变得擅长于一些成年后具体需要做的事情，比如追逐、猛扑、攀爬。
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Prey species, like young deer or goats, for example, typically play by performing sudden flight movements and turns, whereas predator species, such as cats, practice stalking, pouncing, and biting.