How do they thrive without the significant inner-urban space and floor areas that these clever structures provide?

如果没有这些巧妙的结构所提供的重要的城市内部空间和建筑面积，它们的城市建筑如何茁壮成长?

The Alps covers most of Austria and Switzerland as well as significant areas of Germany, France, and Italy.

阿尔卑斯山横亘了奥地利和瑞士的大部分，以及德国、法国和意大利相当大的地区。

The number of rivers with significant catchment areas has fallen from more than 50,000 in the 1950s to 23,000 now.

重要集水区的河流数量已从50年代的50,000条减至如今的23,000条。

(drum pounds) (pulsing music) Okay, first, a quick look at some globally significant drought areas.

（鼓点）（脉动音乐）好的，首先，快速浏览一些全球重要的干旱地区。

So where in the world do we find  significant areas of hot and dry conditions?

那么世界上哪里可以找到大面积炎热干燥的地区？

We'd ideally have an assumption that in any relationship, there would be significant areas of disagreement which could well turn out to be irrseolvable.

理想情况下， 我们会假设在任何关系中， 都会存在重大分歧，而这些分歧很可能最终无法解决。