An area four times the size of the United States is frozen over.

四倍于美国国土面积的土地仍覆盖在冰雪之中。

The 2004 fires scorched seven times the 50-year average land area for Alaskan burns.

2004 年的大火烧焦面积是阿拉斯加 50 年平均烧伤面积的七倍。

We can solve that to get force perpendicular to the surface equals pressure times area.

我们可以解决这个问题，使垂直于表面的力等于压力乘以面积。

They include three important areas: time control, classroom note-taking, and textbook study.

它们包括三个重要领域：时间控制、课堂笔记和课本学习。

So with an F.A.R. of 10, you can build 10 times the floor area of the lot, in whichever configuration: using the whole lot for a 10-story building, or just half for 20 stories.

所以有了 F. A. R.10，你可以建造 10 倍的地块建筑面积， 无论哪种配置：使用整个地块建造 10 层楼，或只使用一半建造 20 层楼。

And the integral with respect to area is just area, however, there are two ends, the left  and right ends, and they both have the same area, so that is 2 times the area of 1 end.

对面积的积分就是面积，但是有两个端， 左端和右端，它们的面积相同， 所以是 1 端面积的 2 倍。