People do not analyze the problem they meet. People often accept the opinions or ideas of other people. People may learn from their past experience. People can not solve some problems they meet.
understand the world and other people better teach each other to speak, write, read and draw know what other people are thinking about learn what's happening in the world more quickly
very few people have the sensitivity of the blind' blind people can manage to see things, but not clearly not everybody sees with his eyes it is possible to narrow the photosensitive areas of the body
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