另外，我们将要通过为当前美国人创造就业机会，同时为美国未来的基础设施建设贡献力量。从第一条铁路建成到州际公路系统，我们的国家一直在建设之中。
Next, we can put Americans to work today building the infrastructure of tomorrow. (Applause. ) From the first railroads to the Interstate Highway System, our nation has always been built to compete.
去过去40年间，州际公路系统对美国经济增长起着重要的作用。
The Interstate Highway System has been an important part of the nation's economic growth during the past 40 years.
去过去40年间，州际公路系统对美国经济增长起着重要的作用。
The Interstate Highway System has been an important part of the nation's economic growth during the past 40 years.
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