求翻译：　People live in cities today think that meat is something that comes wrapped in cellophane．from the supermarket，potatoes come by the pound in plastic or paper bags，and feather grows in hats. The city dwellers’ views are quite different from the views of their ancestors, who knew that? meat is hunted down in the forest，potatoes are planted and weeded，and only birds can produce1eathers. Yet, whether people today realize it or not，they are still as dependent on animals and plants for their existence as their ancestors were．是什么意思？

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