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专四听写练习 Crisis

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Crisis   

  Life is a contest! Who will win? A bluebird and sparrow both compete for space to build their nests. A fast-growing maple tree and slower-growing dogwood compete for the sunlight they both need. Oil competes with coal and nuclear power as an energy source for electric power plants!

  There is a problem. There is a limited amount of space for birds, sunlight for trees, and energy for people! If we do not cut back on our uses of some of our resources, someday they will be gone!

  How can we use energy today and know we will have enough to go around in the future? We can choose alternate, or replacement, energy resources. It takes the earth millions of years to create coal, oil, and gas. They are nonrenewable resources.

  Solar energy, wind energy and water energy are renewable resources. It takes the earth millions of years to create coal, oil, and gas. They are nonrenewable resources.

  Solar energy, wind energy and water energy are renewable. What other ways can we conserve our sources? How can we make sure there is always enough to go around?   

  

Useful words and expressions: 
bluebird 蓝知更鸟
  sparrow 麻雀
  dogwood 山茱萸
  power plant 发电厂,发电站
  alternate 替换物
  nonrenewable resources 不可再生资源
  conserve 保存,保藏

重点单词   查看全部解释    
conserve ['kɔnsə:v,kən'sə:v]

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n. 蜜饯,果酱
vt. 保存,与糖放在一起,

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limited ['limitid]

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adj. 有限的,被限制的
动词limit的过

 
compete [kəm'pi:t]

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vi. 竞争,对抗,比赛

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replacement [ri'pleismənt]

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n. 更换,接替者

 
alternate [ɔ:l'tə:nit,'ɔ:ltə:neit]

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adj. 交替的,轮流的,间隔的
v. 交替,

 
source [sɔ:s]

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n. 发源地,来源,原始资料

 
contest ['kɔntest,kən'test]

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n. 竞赛,比赛
vt. 竞赛,争取

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