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　　劍橋雅思寫作真題之生產流程圖題目解析！本文我們繼續為大家分享雅思寫作題目解析，供各位同學學習參考，小編提醒大家雅思寫作一定要多讀多寫多練，這樣才能高效提升！更多雅思寫作備考干貨，請持續關注培頓 教育！

　　水力發電

　　這道題是劍十四的第三篇小作文，初看上去著實讓人腦殼痛。整個圖比較混亂，箭頭指向也是不同于以往的流程圖。但是仔細分析之后不難看出，本題展現的其實是兩個不同的工作原理：白天工作原理和晚上工作原理。分析出這一點，那么本題的寫法自然就清晰得多了。如下例文供大家參考：

　　The working theory of a hydropower station built on a river is demonstrated by this flow chart. The operating mode of it varies from the daytime to the night.（開頭段先是改寫題目，再一句點出本題其實介紹的是白天黑夜兩個不同的工作原理。）

　　By daylight, water stored in a high-level reservoir initially flows downstream through the intake under the dam, and then drives turbines, and finally arrives at a low-level reservoir. These turbines, powered by the water flow, can correspondingly operate agenerator in the power station. The electricity produced, in the last step, will be transferred to the National grid through power lines.（主一段著重于白天工作原理的描寫。）

　　By night, water in the low-level reservoir can be pumped upstream to the high-level reservoir through the same riverway by turbines designed to be able to operate both clockwise and anticlockwise. In thisprocess, these turbines spin in the opposite direction as the daytime. The intake under the dam is a non-return one, which is closed at night in order to ensure that water can flow into the high-level reservoir, but not out.（主二段自然是聚焦于夜晚工作原理的描寫。本段需要注意的是“反轉的渦輪”和“閉合的intake”。這些都是圖中細節，不應該忽視。）

　　To sum up, the power station functions in totally opposite ways in the daytime and at night. In the whole process, water is utilized as the energy carrier, which at first releases its gravitational energy to produce electricity and then helps transform electricity into gravitational energy. （結尾段總括全文，揭露出這個工作原理的本質。）

　　地熱能發電

　　其實大部分生產流程圖的寫法都大同小異，水力發電的原理會寫了，那么地熱能發電的原理也基本如出一轍。請大家參考下面例文。

　　The working theory of utilizing geothermal energy to produce electricity is demonstrated by this flow chart.

　　Initially,cold water will be pumped into the injection well, which is underground at the depth of around 4.5 kilometers. After being injected, cold water will flow through the geothermal zone, where it will be heated by hot rocks. After becoming hot water, it will be kept in the production well. Thereafter, through pipes, the hot water will be pumped again up to a condenser on the ground.

　　Then,the hot water in this condenser will emit steam with high temperature. Being powered by the steam, the turbine begins spinning.Subsequently, the generator will be driven by the spinning turbine,thus producing electricity. Thereafter, the electricity from the generator will be transported to the grid for all users.

　　To sum up, the flow chart reveals how geothermal energy is used for generating electricity in five sequential stages. During the whole process, cold water will be heated and release steam which is able to power the generator. This is how the whole process functions.