I suspect that motivation plays a role in many aspects of cognition, not just in cooperative behavior, but also in social learning, in communication.

我猜想动机在认知能力的多个方面都发挥了一定的作用，不仅仅是合作行为，也包括社会学习和信息交流。

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Dr. de Waal, a primatologist, has long studied the cooperative side of primate behavior and believes that aggression, which he has also studied, is often overrated as a human motivation.

德·瓦尔博士是一位灵长类动物学家，他已经研究灵长类动物的合作行为很长时间了，而且他认为他们的侵略行为，这也是他所研究的东西，常常会被高估为人类动机。

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Cooperative efforts result in more positive attitudes toward the tasks being completed and greater continuing motivation to complete them.

团队合作、共同努力的直接效果是产生更加积极乐观的态度，并且更能够激励大家达成最终目标。

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