中小学作文精选-英语四级作文-NoisePollution(噪音污染--范文

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

NoisePollution(噪音污染)

Noise Pollution We know the sounds of cities are loud enough to cause great harm to people's hearing in the U.S. One person out of twenty has got some hearing loss. And all over the world the situation is getting worse and worse all the time since the noise increases with the population. With the development of machines, noise has also increased greatly in the 20th century. We live surrounded

by loud planes, trucks and electric tools. TV sets and radios add up to 90 or J00 decibels, a certain unit used to measure the loudness of sound. A normal dialogue reaches 55 decibels; a plane goes to 100, and an ordinary train, reaching the station, can be twice as loud as the loudest plane. Disco music reaches about 118. At

decibels the ear stops hearing sound, and pain starts. How terrible if things go on

like this!噪音污染众所周知,在美国,城市巨

大的噪音对人们的听力造成了极大的损害。每

20个人中就有一个有不同程度的听力损伤。就

世界范围看来,因为噪音随着人口的不断增长,而越来越严重,这种情况也愈发恶化。20世纪,随着机械制造业的发展,噪音污染也日益

加剧。我们生活在震耳欲聋的飞机、卡车和电

器中。电视和收音机加起来甚至达到90至100

分贝(分贝:一种测定声音大小的特定单位)。

20 × 20

相关文档
最新文档