本来可以阻止灾难发生的工程措施没有实施，设备安全测试也是一拖再拖。
Engineering measures that might have prevented the calamity were not carried out, tests of safety equipment delayed.
独特之处: 在没有窗户的封闭隧道中连续行驶20分钟会让人感觉乏味，所以心理学家和工程师决定采取措施，维持驾驶员的注意力集中。
Why It's Unique: Driving through a windowless tunnelfor 20 minutes can get a bit monotonous, so a team of psychologists andengineers focused on retaining driver concentration.
同时，美国陆军工程师们并没有拿出增高堤坝和海岸线的合理方案，该计划曾被国会称为“第五类”的保护措施。
The Corps of Engineers, meanwhile, has failed to produce plans for higher levees and coastal restoration that would provide so-called “Category 5” protection, as Congress has demanded.
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