2022年英语专四听力dictation备考训练(93)

2021-11-24 17:38:00来源:网络

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  Pigeons

  There are thousands of pigeons in any big city in the world. But did you

  know that this common bird is able to find its way home from even hundreds of

  kilometers away?

  Just how pigeons find their way home is a bit of a mystery. Some people

  think that they use landmarks-that is, the pigeon knows what the land is like

  from the air and it uses this like a map. A landmark in Sydney, for example, is

  the Opera House, which can easily be seen from a long way off. Other

  possibilities are that pigeons use the position of the sun to work out

  directions. Or that they have some kind of built-in compass. For quite a few

  years now scientists have been carrying out experiments on homing pigeons, but

  they still aren't sure how pigeons find their way home. It seems likely,

  however, that pigeons, like airline pilots, use a number of different methods to

  guide them on their long-distance journeys. Perhaps one day we'll learn their

  secret.

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