We have economic geography - in which we examine all kinds of resources and their use - agriculture, for example.

我们有经济地理学，我们考察各种资源和它们的使用情况，例如农业。

Flyvbjerg is an economic geographer who years ago became fascinated with infrastructure megaprojects.

Flyvbjerg 是一位经济地理学家，多年前就对大型基项目着迷。

That is because of the country's high economic growth, geography, population centers and possibilities for " clean energy, " he said.

这是因为该国的经济速发展，地理位置，人口密度和开发“清洁源”的，他说。

In practice, a combination of economics and geography means that much of its infrastructure is concentrated in a comparatively small number of places.

实际上，说它是经济学和地理学的结合，其意为它将众多的基集中于相对少数的空间内。

History is the most common kind of social studies, but it could also include geography, economics, the study of government (what we might call " civics" ), even anthropology in some schools.

历史是最常见的社会研究，但它也包括地理、经济学、政府研究（我们称之为“公民学”），甚至在某些学校中甚至包括人类学。

But in order to do so, the project is struggling against the enormous challenges of geography, economics, demographics, America's own cultural and historical preferences for cars and planes, the legal system and more.

但为了够早日修建完成，该项目正努力应对地理、经济、人口统计、美国自身对汽车和飞机的文化与历史偏好、法律制度等方面的巨大挑战。