【新编大学英语】（第一册）Unit 5 B 动物表演（1/3）

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上期链接戳这里Probably everyone has seen baby animals such as kittens and puppies play. These young animals certainly seem to be having fun. They chase each other, tumble and wrestle, chase their tails, and play with objects such as balls and sticks. Anyone who has watched pandas as they tumble and play with one another can see that they are enjoying themselves.
Do all animals play? What is the purpose of their playing? These are some questions that scientists ask. In order to answer these questions, we must first agree on a definition of play. This is difficult, since even animal scientists do not agree on a definition and the verb to play has many different meanings.
For this discussion, we will use our common sense to decide what play is. From our experience, we can say that play is something that humans and animals do for fun. It often imitates serious and purposeful activities, but it doesn't achieve a serious goal. Of course, humans often play very seriously. Sports are examples of serious, elaborate play.