This circulation gets moreor less switched off at night when the temperature gradients disappear or reverse, avoiding heat loss and keeping the nest at a roughly constant temperature.
夜间当温度变化消失或是与白天截然相反时,巢内空气循环减弱,有效避免热流失,使得巢穴室温保持稳定。
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But unless we reverse the steady increase in greenhouse-gas emissions, over the long term, the world's temperature is going in one direction: up.