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model answer
1.The charts compare the sources of electricity in Australia and France in the years 1980 and 2000. Between these years, electricity production almost doubled, rising from 100 units to 170 in Australia, and from 90 to 180 units in France.
2.In 1980 Australia used coal as the main electricity source (50 units) and the remainder was produced from natural gas, hydro power (each producing 20 units) and oil (which produced only 10 units). By 2000, coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source supplying approximately 20%.
3.In contrast, France used coal as a source for only 25 units of electricity in 1980, which was matched by natural gas. The remaining 40 units were produced largely from oil and nuclear power, with hydro contributing only 5 units. But by 2000, nuclear power, which was not used at all in Australia, had developed into the main source, producing almost 75% of electricity, at 126 units, while coal and oil together produced only 50 units. Other sources were no longer significant.
4.Overall, it is clear that by 2000 these two countries relied on different principal fuel sources: Australia relied on coal and France on nuclear power.
分析：第一段：
1 The charts compare the sources of electricity in Australia and France in the years 1980 and 2000
Compare是“对比”，因为本文有两个国家四幅图，所以用compare就比较合适。这一句同样是对题干进行改写，交代一下这是什么图。
2 Between these years, electricity production almost doubled, rising from 100 units to 170 in Australia, and from 90 to 180 units in France.
Double是动词“翻倍”的意思，这里主要讨论数据的整体变化趋势，rising 是rise的现在分词形式，相当于which rises或which rose。
第二段：
1 In 1980 Australia used coal as the main electricity source (50 units) and the remainder was produced from natural gas, hydro power (each producing 20 units) and oil (which produced only 10 units).
这个句子主要写澳大利亚1980年的最大能源比例，属于特殊值或特征值。And the remainder 是“其余的电”，remainder相当于代词。这样通过一个句子将其他不重要或不是特征的数值全部说出。
2 By 2000, coal had become the fuel for more than 75% of electricity produced and only hydro continued to be another significant source supplying approximately 20%.
By 2000，到了200年。是引出数据对比。More than 75%，多于75%。And only hydro引出另外一个特殊值，即水能。
第三段：
1 In contrast, France used coal as a source for only 25 units of electricity in 1980, which was matched by natural gas.
In contrast，相反。引出法国情况，作为一种对比。Which引导定语从句，which was matched by 连接另外一个成分coal，两者数量相等。用match这个动词。
2 The remaining 40 units were produced largely from oil and nuclear power, with hydro contributing only 5 units.
Be produced by 被---生产的。With引出复合结构。With sht doing。Contribute 是“贡献”。因为hydro与contribute是主动关系，所以用Contributing，如果逻辑关系式被动，就用contributed。
3 But by 2000, nuclear power, which was not used at all in Australia, had developed into the main source, producing almost 75% of electricity, at 126 units, while coal and oil together produced only 50 units.
But引出两个不同情况的对比，by 2000引出时间。Which 引出定语从句。Not at all，根本不。Had developed 是主语nuclear power的谓语动词。Producing是现在分词做伴随状语，相当于定语从句 which produces。While是连词“而”，连接另外两个对比的东西。Only起强调作用，表示“少”。
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