They were alone on sixty-four million square miles of ocean.

VOA: special.2011.05.04

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

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So, I already said what the number of square miles that were increased, but it increases from six to sixteen million of the population.

我已经提过了领土扩大的面积有多少,而人口从六百万增加到一千六百万

耶鲁公开课 - 欧洲文明课程节选