在过去的几十年里，美国的中产阶级家庭曾经依靠努力工作和公平竞争来保证自己的财务安全，但现在的经济风险和新出现的情况已经改变了这种状况。

During the past generation, the American middle-class family that once could count on hard work and fair play to keep itself financially secure has been transformed by economic risk and new realities.

youdao

现在情况已经有所改变，Kayak似乎已经改变了其竞争对手的想法。

Not any more - Kayak appears to have changed many of its rivals' thinking.

youdao

但是现在，情况已经改变了。

But now, situations have changed.

youdao

Now,that has changed, for sure; but,the centralization of the French government and the domination of Paris over the life of the nation is very difficult to change, over a long period of time.

现在,情况已经发生了改变,但是法国政府的中央集权化,以及巴黎在国民生活中的支配地位,在相当时间段内,都很难得以改变

耶鲁公开课 - 1871年后的法国课程节选