课程咨询

托福考试网 托福资料下载 托福资讯 0元讲座 水平测试

托福考试练习
新东方在线 > TOEFL > 托福听力 > 正文
托福培训

扫码免费领资料

内含托福全科备考资料

更有免费水平测试及备考规划

托福培训

扫码关注掌握一手留学资讯

回复XDF免费水平测试

录播精讲 直播课HOT

托福听力练习-科学美国人60秒:城市化公式

2017-03-06 08:50:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：城市化公式

　　科学美国人60秒中英文翻译：城市化公式

　　科学美国人60秒英文文本

　　For the first time, more people now live in cities than the countryside—a trend of increasing urbanization that is expected to continue.

　　Based on data from thousands of cities on everything from number of patents generated to road lengths, researchers at the Santa Fe Institute have uncovered the math by which human settlements grow from town to city to metropolis. So, for example, a social network between people within the city grows in a mathematical relationship with the increase in the size and quality of infrastructure, such as roads, power lines and the like.

　　In essence, the bigger the city, the greater the opportunities—but negatives or costs also rise, such as crime or traffic congestion. To optimize urban function, the research suggests following policies that allow for a denser web of human connections while minimizing the costs imposed by transportation and energy use.

　　The real test of these ideas will be how they stack up against data from the burgeoning cities of the developing world. China alone has added hundreds of cities with millions of people in the last few decades—and wants to add yet more. To do it right, city planners will need to brush up on their math.

　　中文翻译请点击下一页

本文关键字: 托福听力练习 科学美国人60秒

上一页 1 2 下一页

托福辅导

关注新东方在线托福

托福机经·Official题目练习

考前重点突破·听说读写海量资料

更多资料

关注新东方在线托福，
回复【XDF】获取大礼包

托福辅导
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.点击【添加】，回复对应关键字领取学习资料。
更多>>
更多内容

免费获取托福备考大礼包

微信扫描下方二维码 立即领取

托福辅导
更多>>
更多公益讲座>>
更多>>
更多资料
托福TPO 托福听力练习 托福口语练习 托福阅读练习 托福写作练习
我要
反馈 返回
首页
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10