78.
Traffic control systems and methods of construction developed under the interstate program soon influenced highway construction around the world, and were invaluable in improving the condition of urban streets and traffic patterns.
【分析】本句为简单句。句子主干为 system and methods influenced construction and were invaluable。第二个and连接两个并列谓语。developed under the interstate program 是过去分词短语作后置定语,修饰 systems和methods。
【译文】在州际公路项目下发展的交通控制系统以及建筑方式很快影响到了世界范围公路的建设,并为改善城市街道和交通模式起到了重要作用。
79.
By opening the North American continent, highways have enabled consumer goods and services to reach people in remote and rural areas of the country, spurred the growth of suburbs, and provided people with greater options in terms of jobs, access to cultural programs, health care, and other benefits.
【分析】本句为简单句。句子主干为highways have enabled to reach people, spurred the growth, and provided people with options。By opening the North American continent 是方式状语。
【译文】通过开通北美洲路线,公路使得消费品和服务能够到达住在边远地区和农村地区的人们那里,刺激周边地区经济发展,为人们提供更多选择,如工作、文化活动、保健及其他福利。
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