But here's the punch line: laughter and joy are not unique to humans, the study says. Ancestral forms of play and laughter existed in other animals long before humans began cracking up.

研究结果同时表明，笑和喜悦并不只是人类所特有的，早在人类会笑之前，其它一些动物就已经拥有原始形态的笑声了。

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This provides an opportunity to exercise, take baths, play with toys and other forms of birdy entertainment.

这提供了机会行使，洗澡，玩玩具和其他形式的怪的娱乐。

youdao

But heres the punch line: laughter and joy are not unique to humans, the study says. Ancestral forms of play and laughter existed in other animals long before humans began cracking up.

研究结果同时表明，笑和喜悦并不只是人类所特有的，早在人类会笑之前，其他一些动物就已经拥有原始形态的笑声了。

youdao

" But, he says, "they should not replace other avenues of learning, replace or diminish more active forms of play, or become a babysitting device.

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Yes, the ability to play and interact with others is a benefit of games over those other forms of media.

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