英语翻译Scientists long reasoned that,since water has the unusua

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/28 19:49:16

英语翻译
Scientists long reasoned that,since water has the unusual property of being less dense as a solid than as a liquid,its melting point can be lowered with an increase in pressure.While this is true,even the sharpest of skates raises the melting point by only a few degrees.The pressure theory doesn’t hold water unless the ice is pretty warm already.Something else must be going on.
Some studies suggest that friction from a moving shoe,skate or tire causes the heat necessary to melt the ice beneath it.But what if the shoe isn’t moving at all?A second theory proposes that ice inherently has a fluid layer,caused by the motion of surface molecules that have nothing above to bind to and so move around in search of stability.The slippery culprit may be a combination of these two theories.

科学家长期的记录显示,由于水具有不同寻常的特征--液体状态下的水比固体状态下的密度低,它的熔点会随着压力的增加而降低.事实上这是真的,甚至是最锋利的溜冰鞋也会将冰的熔点上升几度.但当冰的温度较高的时候,这种观点就站不住脚了.会有一些其它的变化.
一些研究表明,由一双移动的鞋子,溜冰鞋或轮胎产生的磨擦都会到达使冰融化的温度.但是如果鞋子没有动呢?第二种理论证明冰本身就有流动层,这是由于冰的表面没有固定的分子移动以便寻找固定的位置造成的.
这些冰之所以滑的原因正体现在这两种理论的共同作用上.

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