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[audioFiles]2017m6x/audio_ezfm_013_201706[/audioFiles]

游客2024-09-13  35
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答案                               Glaciers
   Glaciers are formed in places where the temperatures are extremely cold. / In such cold places it snows most of the year. / Every time it snows, the below layers will compress more, / finally turning into hard ice. / This ice is what forms the glacier. /
   For a glacier to form and sustain itself, / the amount of snow that falls on it / must be more than the amount of glacier that has melted. / This is the only way in which the glacier will be able to maintain itself / and keep increasing in size. /
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