为了使地球保持恒定的平均温度，来自地球的这种辐射必须平衡入射的太阳辐射。
For the Earth to maintain a constant average temperature, such emissions from the planet must balance incoming solar radiation.
黑色物体在恒温条件下是温度的完全辐射器，因为到达和离开该物体的辐射量必须保持平衡。
A black body maintained at a constant temperature is a full radiator at that temperature because the radiation reaching and leaving it must be in equilibrium.
根据雪覆盖层的热量平衡方程，建立了雪表面辐射温度的预测模型。
Based on the heat balance equation of the snow cover, a prediction model for radiative temperature of the snow surface was established.
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