According to Transportation for America, an advocacy group, one in nine highway Bridges are "structurally deficient" -a quality they seem to share with America's Congress.
根据利益团体美国运输团体，每九个公路桥就有一个是“结构缺陷”，在这点上，这些公路桥倒是和美国国会相同。
Better design and wiser use of both mass transit systems and private vehicles will play an important part in helping America get more out of energy used for transportation.
对公共交通系统和私人汽车进行更好的设计及更合理的使用，会在帮助美国交通获得更多可用能量上发挥重要作用。
As America grew and white settlers moved west, many felt a great need for good transportation. They wanted railroads that reached across the continent from the Atlantic Ocean to the Pacific Ocean.
随着美国的不断扩张和白人不断向西部迁移，对良好的交通条件的需求越来越强烈，他们希望能够修建从大西洋横贯整个大陆到达太平洋的铁路。
As America grew and white settlers moved west, many felt a great need for good transportation. They wanted railroads that reached across the continent from the Atlantic Ocean to the Pacific Ocean.
随着美国的不断扩张和白人不断向西部迁移，对良好的交通条件的需求越来越强烈，他们希望能够修建从大西洋横贯整个大陆到达太平洋的铁路。
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