But for air, the earth would undergo extreme changes in temperature.
要是没有空气，地球温度就会发生剧变。
Without air, the earth would undergo extreme changes in temperature.
没有空气的话，地球上的气温变化将非常 大。
Without air, the earth would undergo extreme changes in temperature.
没有空气地球温度就会发生剧变。
In harsh climate region, the air temperature changes greatly between winter and summer.
由于严寒地区冬季气候寒冷、年内气温变化幅度大；
In harsh climate region, the air temperature changes greatly between winter and summer.
由于严寒地区冬季气候寒冷、年内气温变化幅度大；
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