登录 | 注册 | 付费 | 个人中心
关注我们:
您的位置:首页 > 英语阅读 > 科普技术
字号: 加大减小

Lightning

--闪电

难度: 高一  |  词数: 249  |  更新日期: 2013-12-18  |  文章来源: 网络
显示语感划分 | 显示词组 | 隐藏A标  [划分说明]

In earliest times, men considered lightning to be one of the great mysteries of nature. Some ancient peoples believed that lightning and thunder were the weapons of the gods.

In reality, lightning is a flow of electricity formed high above the earth. A single flash of lightning 1.6 kilometres long has enough electricity to light one million light bulbs.

The American scientist and statesman, Benjamin Franklin, was the first to show the connection between electricity and lightning in 1752. In the same year he also built the first lightning rod. This device protects buildings from being damaged by lightning.

Modern science has discovered that one stroke of lightning has a voltage of more than 15 million volts. A flash of lightning between a cloud and the earth may be as long as 13 kilometers, and travel at a speed of 30 million meters per second.

Scientists judge that there are about 2,000 million flashes of lightning per year. Lightning hits the Empire State Building in New York City 30 to 48 times a year. In the United States alone it kills an average of one person every day.

The safest place to be in case of an electrical storm is in a closed car. Outside, one should go to low ground and not get under trees. Also, one should stay out of water and away from metal fences. Inside a house, people should avoid open doorways and windows and not touch wires or metal things.

With lightning, it is better to be safe than sorry?

显示语感划分 | 显示词组 | 隐藏A标

词组意思:

  • in reality 实际上, 事实上
  • Benjamin Franklin 本杰明·富兰克林
  • between...and... 在...和...之间
  • lightning rod 1) 避雷针 2) 引火烧身的人(或事)
  • protect...from... 保护...免受...(破坏/攻击/伤害), 保护...以免...
  • more than 超过, 不只
  • as long as 长达...
  • Empire State Building 帝国大厦(位于美国纽约州)
  • New York 纽约
  • the United States 美国
  • in case of... 假使, 万一
  • electrical storm 电暴;雷暴
  • go to... 去...
  • stay out of... 1) 避开;远离 2) 不介入,不干预
  • away from... 离...(一段距离)

联系我们 | 意见反馈 | 商务登录 | 商标声明 | 站点地图

版权所有:广州奥文信息科技有限公司 Copyright © 2011 All Rights Reserved.
粤ICP备: 11095722号    增值电信业务经营许可证: 粤B2-20120156 许可证