Between the 1620s and the 1740s, the land of the Russian empire increases from 2.1 million square miles to 5.9 million square miles.

在17世纪20年代到40年代间,俄帝国的领土,由210万平方英里,增加到590万平方英里

耶鲁公开课 - 欧洲文明课程节选

Back in the late nineteenth century the dividend price ratio was typically 5%.

回溯19世纪,股利价格比一般为5%

耶鲁公开课 - 金融市场课程节选

In the 1830s 600,000 immigrants came to the United States, almost entirely from Western Europe; in the 1840s alone 1.5 million; and in the 1850s,almost 3 million more.

十九世纪三十年代,约有六十万人移居美国,几乎全部来自西欧,仅在四十年代,就有一百五十万移民,而在五十年代,又多了三百万

耶鲁公开课 - 美国内战与重建课程节选