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[audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_084[/audioFiles]

游客2024-09-23  6
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答案                                 Hurricanes
    Warm water and moist, warm air are two main factors / that are responsible for causing hurricane storms. / Hurricanes occur when the moist, warm air from the surface of the ocean rises and meets the cooler air. / There is also release of hidden heat due to cooling process, / which increases the temperature of the cooler air above. / In the cycle, more warm, humid air rises and joins the developing storm. / Hence, there is a transfer of heat from the surface of the ocean to the atmosphere above. / As the cycle of exchanging heat continues, a wind pattern is created / that moves in a twisting fashion around a calm center, / which is called as the hurricane eye. / The increased circulation of warm, humid air enhances the speed of wind. / Another factor that increases the speed of wind / is high-pressure air at high altitude. / As this high-pressure air moves to the center and meets the low-pressure air, / the wind speed again increases.
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