A surplus allows snow to accumulate and for the pressure of snow accumulated over the years to transform buried snow into glacial ice with a depth great enough for the ice to flow.
剩余的积雪能够让雪集成堆，且由于多年的积雪形成的压力，剩余的积雪能够让掩埋的雪变成冰川冰，这些冰川冰的厚度足以使冰块流动。
Angela had to dig her car out, because after the heavy storm, snow accumulated to a depth of five feet.
安吉拉不得不把她的车挖出来，因为暴风雪过后，积雪达五英尺深。
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