In winter the heat produced by a city can equal or surpass the amount of heat available from the Sun.
在冬天,一个城市产生的热量可以与太阳提供的热量相等,甚至超过这一数值。
As with the water that surrounds a desert island, there is abundant energy right under people's noses, in the form of wind, sun, tides and heat.
就如同一个荒岛四面环水一样,丰富的能量以风、阳光、潮汐和热的形式就存在于我们身边。
A piece of metal left in the sun rises in temperature until it loses heat at the same rate while it absorbs heat.
一片放在阳光下的金属,其温度要上升到它吸收热量和失去热量的速率相等时才停止。
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