让我们在这个课程里漫游美国，你可以了解著名的美国地标在历史上和地理上的重要性。

Take a trip around the United States in this course as you learn about the historical and geographical importance of popular United States landmarks.

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短暂而辉煌的历史、得天独厚的地理环境、雄厚的经济实力等赋予美国安全观以其他国家所不具有的独特性。

The brief yet splendid history, advantaged geographical environment as well as its powerful economic strength has endowed America with its unique security concept.

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当然，这种情况一部分是由于历史和地理原因造成的：美国消费市场巨大，同时缺少类似欧洲那样的区域融合。

Certainly part of that is history and geography: America's own massive consumer market, and lack of regional integration (like Europe).

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