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托福听力学科背景知识:ENERGY

2018-08-08 11:15:26来源:网络

  为了辅助大家更好地备考托福听力考试,新东方在线托福网为大家整理了一些考试中常见的学科背景知识,了解这些内容,辅助大家更好地了解学科知识,对大家的考试有一定的帮助。下面就让我们来看看本期的学科知识吧!

【点击查看托福听力学科背景知识汇总】

  ENERGY

  An early source of energy, or prime mover, used by humans was animal power, i.e., the energy obtained from domesticated animals. Later, as civilization developed, wind power was harnessed to drive ships and turn windmills, and streams and rivers were diverted to turn water wheels (see water power). The rotating shaft of a windmill or water wheel could then be used to crush grain, to raise water from a well, or to serve any number of other uses. The motion of the wind and water, as well as the motion of the wheel or shaft, represents a form of mechanical energy.

  …NEW ENERGY source is tidal energy. Experimental systems have been set up to harness the energy released in the twice-daily ebb and flow of the ocean’s tides

  以上就是为大家整理的“托福听力学科背景知识:ENERGY”,更多精彩内容请关注新东方在线托福频道!


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