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  剑桥雅思14写作Task1题目：

  The diagram below shows how electricity is generated in a hydroelectric power station.Summarise the information by selecting and reporting the main features,and make comparisons where relevant.

  参考范文：

  The diagram shows the components of a hydroelectric power station and what happens there to generate electricity for the grid.

  At the 'beginning'of the diagram,we can clearly see that the high-level reservoir with main dam is situated and fed by a river.At the base of the dam is where the intake is located and it indicates that it is 'open'during the day.During the day,with the intake open,the flow of water down will be able to move the turbines that are attached to the generator that is,in turn,attached to power lines and the national grid.The water is stored in a low-level reservoir at this time.

  During the night,this process is reversed.The turbines are labelled as reversible,which means that they are used at night to reverse the direction of the water.It is unclear from the diagram exactly where the water goes after it is pumped up towards the intake and high-level reservoir,as the intake is labelled as 'closed'at night,but it is assumed that there is some mechanism allowing the water to be re-added.

  In summary,the flow of water shown shows a bi-directional pattern that allows water to be re-used in the creation of electricity for the national grid.(215 words)

  翻译：

  示意图显示了水力发电站的组成部分,以及它如何给电力网发电。

  从示意图的开端我们可以清晰地看见,带有主坝的高处的蓄水池坐落在河边,并且由这条河提供水源。大坝底部是进口,白天的时候是打开的。白天,进口打开,下来的水流推动和发电机连在一起的涡轮机,同时发电机是和电源线以及国家电网连在一起的。此时,水被储存在低处的蓄水池中。

  到了夜晚,这一过程颠倒过来。涡轮机上写着“可逆”,这意味着晚上它们用来将水向相反的方向运输。虽然无法从该示意图得知水流被抽入进口和高处蓄水池的县体位置(因为进口处写着“晚上关闭")不过我认为存在某种机械装置,让水重新流入蓄水池。

  总之，示意图中的水流显示的是定双向模式,使得为国家电网发电的水可以重复利用。

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