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1·The warm weather unfroze the ground early.

暖和的天气使大地提早解冻。

2·The warm weather unfroze the ground early .

暖和的天气使大地提早解冻。

3·Rising temperature that unfroze the soil after a severe winter was blamed for the frequent sandstorms this year, he said.

他说，经过严冬之后气温的升高使土壤逐渐解冻，这是引起近期频繁沙尘天气的主要原因。