But railroads revolutionized an American sense of time, their ability to travel.

但是铁路改变了美国人的时间观念,他们有能力去旅行

耶鲁公开课 - 美国内战与重建课程节选

overall, the United States really needs to change their overall outlook on immigrants,

美国需要在整体上对移民的看法有所改变了，

美国的移民政策 - SpeakingMax英语口语达人

Also, the world's diet is changing to look like that of America.

同样地,世界饮食状况的改变,和美国的情况也很相似

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The interesting thing is that through time, as political winds change, these taxes have changed and they've gone up to some very high levels in the past in the United States and other countries.

有趣的是在不同时期,如果政策方向有所转变,税率也会改变,在过去的美国和其他国家,税率曾经相当高

耶鲁公开课 - 金融市场课程节选

If you were to say to me, what do you think is the most important thing, however you define thing, that has changed the character of life in the United States in the twentieth century, I would say the disappearance of farmers.

如果你问我,我认为什么才是,最重要的东西,你认为是什么,在二十世纪改变了,美国人的生活方式,我会说是农民退出了历史舞台

耶鲁公开课 - 古希腊历史简介课程节选

Usually when a change happens in America, it takes years,

一般美国发生什么改变时，会用几年的时间，

进步的旧金山 - SpeakingMax英语口语达人