托福英语 学英语,练听力,上听力课堂! 注册 登录
> 托福 > 托福听力教程 > 托福听力短文 >  列表

托福听力短文 I-16-1

所属教程:托福听力短文

浏览:

gewei

随身学
扫描二维码方便学习和分享
http://online2.tingclass.net/lesson/shi0529/0008/8562/161.mp3
http://image.tingclass.net/statics/js/2012
(man) Today I want to discuss fossil fuels such as coat, oil, and natural gas. The term "fossil fuel" refers to the trapped remains of plants and animals in sedimentary rock. You see, living plants trap energy from the sun by the process of photosynthesis, and they store the energy in their chemical compounds. Most of that energy is released when the plant dies and decays. However, sometimes organic matter is buried before it decays completely. In this way some of the solar energy becomes trapped in rocks --- hence the name fossil fuel. Although the amount of organic matter trapped in any one growing season is small, the accumulated remains from millions of years are considerable. Because the accumulation rate is so slow --- millions of times slower than the rate at which we now dig up this organic matter and burn it for energy --- we must consider fossil fuels as nonrenewable resources. Tomorrow we'll be discussing alternatives to fossil fuels that can be renewed. 内容来自 听力课堂网:http://www.tingclass.net/show-8562-245883-1.html
用手机学英语,请加听力课堂微信公众号:tingclass123
用户搜索

疯狂英语 英语语法 新概念英语 走遍美国 四级听力 英语音标 英语入门 发音 美语 四级 新东方 七年级 赖世雄 zero是什么意思

  • 微信公众号:每日托福
  • [微信扫码,即可关注]
  • 关注有惊喜,经典托福资料免费送! 每天的精彩内容,不容错过。
  • 频道推荐
  • |
  • 全站推荐
  • 广播听力
  • |
  • 推荐下载
  • 网站推荐
0.093750