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Special equipment, such as skis and snowshoes, has long been used to help people move over difficult terrain, such as snow-covered ground. Other inventions, such as the bicycle, make travel over flat terrain faster and more efficient.
Special equipment, such as skis and snowshoes, has long been used to help people move over difficult terrain, such as snow-covered ground. Other inventions, such as the bicycle, make travel over flat terrain faster and more efficient. |
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