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  3. Hydroelectric Energy Hydroelectric energy is made by flowing water. / Most hydroelectric power plants are located on dams

Hydroelectric Energy Hydroelectric energy is made by flowing water. / Most hydroelectric power plants are located on dams

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答案 Hydroelectric Energy Hydroelectric energy is made by flowing water. / Most hydroelectric power plants are located on dams, / which block the river and create an artificial lake. / A controlled amount of water is forced through tunnels in the dam to produce electricity. / Hydroelectric energy has some advantages. / First, it’s fairly inexpensive to produce. / Dams don’t need to be complex, / and the resources to build them are not difficult to obtain. / Second, its source is available to many people as rivers flow all over the world. / Third, it’s fairly reliable for the flow doesn’t depend on the weather but the control by engineers. /
解析                                                                                     水电能源
       水电能源是通过流动的水制造的。水力发电站大多位于水坝上，这些水坝阻截河流，制造出一个人工湖。人们通过控制一定量的水从水坝内的渠道流过来发电。
       水电能源有若干优势。首先，它的生产成本还算低廉。水坝不需要很复杂，而建造它们的资源也不会太难获取。其二，它的来源可以为多数人所得，因为全世界都有河流流过。其三，它较为可靠，因为水流不需要依靠天气而是受工程师的控制。
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