[原文呈现]

　　The Three Gorges① Dam②

　　"Walls of stone to hold back③ clouds and rain"

　　Mao Zedong wrote a poem ④in which he dreamed of⑤ "walls of stone to hold back clouds and rain till a smooth lake rises⑥ in the narrow⑦ gorges". Now his dream has come true⑧. The power of the Yangtze River, which is the world's third longest river⑨，has been harnessed⑩ by the Three Gorges Dam.

　　The Three Gorges Dam, which is the biggest construction⑪ project in China since the building of the Great Wall and the Grand Canal⑫， has been built to control flooding and provide hydro­electric⑬ power for the central region⑭ of China. The dam is nearly 200 metres high and 1.5 kilometres wide. It is the largest hydro­electric power station and dam in the world and has cost more than any other construction project in history.

　　[读文清障]

　　①gorge/ɡɔːdʒ/n.峡谷

　　②dam/dæm/n.坝；堤；水闸

　　③hold back阻止

　　④in which he dreamed of ...是in which引导的定语从句，which指代a poem。

　　⑤dream of做梦；梦见；向往

　　⑥rise vi.上升，升起(rise－rose－risen)

　　⑦narrow/'nærəʊ/adj.狭窄的

　　⑧come true(梦想等)变成现实

　　本短语不用于被动语态。

　　⑨which引导的非限制性定语从句，修饰the Yangtze River, which作从句的主语。

　　⑩harness/'hɑːnIs/vt.利用；将(自然力)变成动力

　　⑪construction/kən'strʌkʃn/n.建造；建设；建筑

　　⑫which is the biggest ...是which引导的非限制性定语从句，which在从句中作主语，指代the Three Gorges Dam。

　　⑬hydro­electric/ˌhaIdrəʊ'IlektrIk/adj.水力发电的

⑭region n．地区