【新编大学英语】（第一册）Unit 5 A 动物的文化（4/4）

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Washoe
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上期链接戳这里By the time she was five years old, Washoe had a vocabulary of 130 signs. Also, she could put them together in new ways that had not been taught her originally. This means she could create language and not just mimic it. She creates her own sentences that have real meaning. This has allowed two-way talk. It permits more than one-way command and response.
Of course, there are limits to the culture of animals. As far as we know, no ape has formed social institutions such as religion or law. Also, some chimpanzees may be able to learn sign language, but this form of language is limited in its ability to communicate abstract ideas. Yet with a spoken language we can communicate our entire culture to anyone else who knows that language. Perhaps the most important thing is that the line dividing us from them is not as clear as we used to think.