But if you think of Spain, if you are hitchhiking through Spain or something like that, or through the south of France, or Eurail passes, and if you go to a town like Avila in Spain.

如果你考虑驾车去西班牙旅行什么的,或者是穿过法国南部,又或者一张铁路通票游遍欧洲,如果你去西班牙阿维拉那样的地方

耶鲁公开课 - 欧洲文明课程节选

There were some twelve to fifteen different widths of railroads in the Northern states alone by the 1850s, and you could go into one town on a gauge, i don't know, three feet wide but on the other side of town it would come out four feet wide.

在五十年代,单就北方州的铁道,就有十二到十五种不同的轨距,你可能在一条三英尺宽的铁道上进镇,但在另一边出镇时,它变成四英尺宽了

耶鲁公开课 - 美国内战与重建课程节选

So I want to go back again, now we're considering the line on the board as being flavor in beer, or location in a town, and I want to go back to politics now and go back to the interpretation we started with, so that left and right will end up being left-wing politics versus right-wing politics.

所以我想返回去,现在我们将黑板上的线看成,啤酒的口味或城市的位置,我现在再回去讨论政治,回去解释我们最初,把线的左边和右边,看成左派和右派的原因

耶鲁公开课 - 博弈论课程节选