下面图表的数据显示融冰期天数的年际变化很大，但是融冰期逐渐增长[念:chang]的趋势显而易见。
The graph below the figures illustrates how the length of the melt season varies significantly from year to year, but the long-term trend is clear.
下面图表的数据显示融冰期天数的年际变化很大，但是融冰期逐渐增长[念:chang]的趋势显而易见。
The graph below the figures illustrates how the length of the melt season varies significantly from year to year, but the long-term trend is clear.
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