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专四听写练习文本 Population Growth

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Population Growth

  It is well-known that there has been a drastic increase in world population. But it is probably les well-known that the extinction rate of wildlife species is experiencing a parallel trend.

  Take the United States for instance. In 1990, U.S. population reached an unprecedented level of 250 million, which is approximately 250 times of that of 1800. On the other hand, wildlife species are disappearing from the country at an alarming rate. By 1990, about 70 wildlife species would never be seen in U.S. We are fully justified in declaring that the explosive population growth has had an adverse effect on the survival of wildlife species and will be a constant threat to the wildlife resources if no immediate actions are taken.

  Nothing has ever equaled the magnitude and speed with which the human species is altering the physical and chemical world. It has been demolishing the environment we are living in.

Useful words and expressions: 
  
drastic 激烈的
  
parallel 平行的
  
trend 倾向
  
unprecedented 空前的
  
magnitude 大小,数量
  
alter 改变
  
demolish 毁坏

重点单词   查看全部解释    
adverse ['ædvə:s]

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adj. 不利的

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unprecedented [ʌn'presidəntid]

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adj. 空前的,前所未有的

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extinction [iks'tiŋkʃən]

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n. 消失,消减,废止

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survival [sə'vaivəl]

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n. 生存,幸存者

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magnitude ['mægnitju:d]

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n. 大小,重要,光度,(地震)级数,(星星)等级

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threat [θret]

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n. 威胁,凶兆
vt. 威胁, 恐吓

 
parallel ['pærəlel]

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adj. 平行的,相同的,类似的,并联的
n.

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demolish [di'mɔliʃ]

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v. 毁,破坏,粉碎

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approximately [ə'prɔksimitli]

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adv. 近似地,大约

 
immediate [i'mi:djət]

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adj. 立即的,即刻的,直接的,最接近的

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