英语听力精选进阶版 7347

生产太阳能电池板的新方法可以使来自太阳的能量比煤炭,天然气和石油更便宜，利物浦大学的研究团队已经把此项研究发表在《自然》杂志上。

Solar cells convert energy from the Sun into electricity. The researchers have replaced a toxic¹ compound, used to make one type of solar cell, with a chemical that is much cheaper, completely safe and works just as well.

The new compound, magnesium² chloride, is used to make tofu and is found in bath salts. It's also found in sea water, and so costs much less than the poisonous chemical currently used.

Dr Jon Major, who led the research at Liverpool University, believes that the ensuing cost savings³ have the potential to transform the economics of solar energy.

Dr Jon Major, Liverpool University:

"Potentially you could reduce the cost of making these solar cells overnight. We think that this process could cause a step change in the cost of solar energy and that could really make the difference into making it competitive with fossil fuels."

More work will need to be done to see if the cost savings found in the lab can work on an industrial scale. But the cost of solar energy has been steadily⁴ falling. And many involved in research in the field believe that it's just a matter of time before it becomes cheaper than coal, gas and oil, and one day replaces fossil fuels entirely⁵.

Grammar

1. What is the main change in the new kind of solar cells?

A toxic compound has been replaced by a new one which is cheaper and not poisonous.

2. Where can you find magnesium chloride?

In tofu, bath salts and sea water.

3. True or false: The cost of solar energy production is getting cheaper with time?

True. It is falling steadily.

4. Which two words in the text mean 'harmful to human health'?

Toxic and poisonous.

Glossary 词汇表

toxic 有毒的，有害的

compound 化合物

ensuing 接下来的，随后的

competitive （价格）有竞争力的

fossil fuel 化石燃料

on an industrial scale 有工业规模，大规模

steadily 稳步地

1 toxic   

adj.有毒的，因中毒引起的

参考例句：

• The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
• There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。

2 magnesium   

n.镁

参考例句：

• Magnesium is the nutrient element in plant growth.镁是植物生长的营养要素。
• The water contains high amounts of magnesium.这水含有大量的镁。

3 savings   

n.存款，储蓄

参考例句：

• I can't afford the vacation,for it would eat up my savings.我度不起假，那样会把我的积蓄用光的。
• By this time he had used up all his savings.到这时，他的存款已全部用完。

4 steadily   

adv.稳定地；不变地；持续地

参考例句：

• The scope of man's use of natural resources will steadily grow.人类利用自然资源的广度将日益扩大。
• Our educational reform was steadily led onto the correct path.我们的教学改革慢慢上轨道了。

5 entirely   

ad.全部地，完整地；完全地，彻底地

参考例句：

• The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
• His life was entirely given up to the educational work. 他的一生统统献给了教育工作。