在美国历史上，移民曾经有很好的机会跃居社会上层。
In American history, immigrants used to have a good chance to move upward in society.
康内斯托加式宽轮篷车在美国历史中的角色。
这种情况在美国历史上也曾发生过。
在美国历史上，这一增长率是非常低的。
在美国历史上最流行的宝宝名是什么呢？
芝加哥在美国历史上占有举足轻重的地位。
可琳恩：在美国历史上酒甚至一度是非法的。
CORINNE: There was a time in American history when alcohol was even illegal.
1968年在美国历史上确实是最重要的一年。
1968 was indeed one of the most significant years in American history.
在美国历史上也有部分类似的先例，但绝对不是现在这个样子。
There have been partial precedents in American history but nothing quite like this.
他们，他们的文化以及语言在美国历史中占据了厚厚一页。
They, their culture and their language were a big part of America's past.
他们，他们的文化以及语言在美国历史中占据了厚厚一页。
They, their culture and their language were a big part of America’s past.
“反精英的传统在美国历史上并不新鲜，”《世界报》写道。
"The tradition of anti-elitism is not new in American history," Le Monde writes.
但是在美国历史的大部分时间里，美元早已经可以兑换成黄金或者银了。
But for most of American history, dollars have been convertible into gold or silver.
这种骁勇捍卫我们的生活方式和神圣的自由遍布在美国历史上。
Throughout American history, this valor has preserved our way of life and our sacred freedoms.
罗斯技巧娴熟地描写了一个美国家庭在美国历史上这一紧张时期里所面临的困难境遇。
Roth expertly describes one family's difficult situation during a tense time in American history.
清教徒不仅在美国历史中扮演过重要角色，同样在哈佛大学的历史中也起到了重 要作用。
Puritans played a very important role in Harvard history as well as in American history.
每一个雕塑都是在影响了美国历史的人。
Each statue is of a person who has made a difference in American history.
在五年级的听写句子中，我们了解到了美国历史。
In the Dictation of Grade Five, we can learn about American history.
在五年级的听写句子中，我们了解到了美国历史。
In the Dictation of Grade Five, we can learn about American history.
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