Most roads, bridges, transit, water systems, the electric grid, and communications networks were installed 50 to 100 years ago, and they are largely taken for granted until they fail.
2017年6月四级真题（第二套）阅读 Section C
The New York State parks system wants to turn off the falls on the American side some time in the next two to three years to replace two 115-year-old stone bridges that allow pedestrians, park vehicles and utilities access to Goat Island.
2016年12月四级真题（第二套）听力
without upgrades and new capacity, bridges, roads and power systems are unable to cope with expanding populations.
2017年12月四级真题（第三套）阅读 Section C
Merian was correct about the giant bird-eating spiders, ants building bridges with their bodies and other details.
2018年12月六级真题（第二套）阅读 Section B
This could reduce the amount of steel needed to make everything from automobiles to buildings and bridges.
2019年6月六级真题（第三套）阅读 Section A
It can uncover laws of nature, cure diseases, make bombs, and help bridges to stand up.
2015年高考英语湖北卷 阅读理解 阅读E 原文
Stronger bridges mean villages are less likely to be left without food and medicine after floods.
2016年高考英语江苏卷 阅读理解 阅读C 原文
While the clip might look like part of a new ad campaign, bridges said the only goal was to show generosity and sympathy.
2019年高考英语浙江卷 阅读理解 阅读B 原文