想更进一步了解这些独特的美国人，我们必须了解他们的历史。
To understand these unique Americans better, it is necessary to understand their history.
大部分美国历史上美国人都在享用唾手可得的土地资源。
Americans enjoyed low-hanging land fruit for much of their country's history.
而且今天，比以前我国历史上任何时候都多的美国人在工作。
And more Americans are working today than ever before in our nation's history.
曾经一度，美国人只知道中国是一个历史悠久的伟大国家，有伟大的文明。
Once, America knew China only by its history as a great and enduring civilization.
纵观整个历史，美国人一直是个迁移的民族。
Throughout their history Americans have been people on the move.
纵观整个历史，美国人一直是个迁移的民族。
Throughout their history, Americans have been people on the move.
舞蹈一直是非裔美国人的经验，文化和历史的核心部分。
Dance has been a central part of the African American experience, culture, and history.
在历史上一直都是被这样认为的，大多数美国人过着奢侈的生活。
It has been thought throughout history that most Americans lead lives of luxury.
在历史上一直都是被这样认为的，大多数美国人过着奢侈的生活。
It has been thought throughout history that most Americans lead lives of luxury.
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