(单词翻译:单击)
In other words, ice absorbs heat from the water.
换言之,冰块会从水中吸收热量 。
As the water molecules lose energy, they begin to slow down, and consequently to cool.
当水分子流失热量后其移动速度回放缓,温度逐渐降低 。
So, it’s kind of the opposite of what we might think: when we put ice in water, the ice doesn’t give its cold to the water, it takes heat from the water.
这可能跟我们假设的恰恰相反:把冰放入水中,冰不会将低温转移到水中,而是从水里吸收热量 。
The cooling process actually happens in stages.
这一冷却过程其实是分阶段进行的 。
Because ice floats, it cools the water near the top of the glass first.
由于冰块会漂浮,因此最上层的水会先降温 。
As the top layer of water cools, its density increases, causing it to sink to the bottom.
当上层的水冷却后,它的密度会增加,上层的水会下沉到底部 。
The lower layer, less dense and therefore more buoyant, floats to the top and is cooled in turn.
底部的水因密度较小会上浮,然后再被冷却,不断循环反复 。
译文为可可英语翻译,未经授权请勿转载!