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托福TPO是托福备考小伙伴们最重要的参考资料，并且这个是在备考时候一定要认真多多练习，托福TPO是非常重要的希望大家一定要重视起来，小编为广大的托福考生整理了托福阅读TPO30原文+答案解析+译文，下面就来跟小编一起来看下面精彩内容吧!
托福阅读TPO30原文
Role of Play in Development
Play is easier to define with examples than with concepts. In any case, in animals it consists of leaping, running, climbing, throwing, wrestling, and other movements, either along, with objects, or with other animals. Depending on the species, play may be primarily for social interaction, exercise, or exploration. One of the problems in providing a clear definition of play is that it involves the same behaviors that take place in other circumstance--dominance, predation, competition, and real fighting. Thus, whether play occurs or not depends on the intention of the animals, and the intentions are not always clear from behaviors alone.
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