1·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。
2·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.
比如说，像小鹿或者山羊这种被捕食的种群，它们的代表动作就是突然快速逃跑的动作和突然转弯；相反的，猫科动物之类的捕食种群会练习潜行追踪、猛扑和撕咬等动作。
3·Stalking and pouncing on imaginary prey aids in a kitten's neural and muscular development.
潜伏前进，对想象猎物目标进行猛扑，这些将有助于猫咪的神经系统和肌肉的发育。