Naturally, there is an economic answer and it is specialisation.

自然，有一个经济上的答案，那就是因人制宜。

I'm not convinced... I certainly think specialisation's going to be the key, knowing your own region, and that comes from hands-on experience.

我不信...我认为专业化将是关键，从实践经验中解自己的领域。

Proximity allows people to find friends, mates and business partners, to discuss ideas and generate new ones, and to trade (and so to capture the benefits of specialisation).

这种接近性让人朋友、伴侣和商业伙伴，讨论并创造新想法，并相互交易(以获得专业分工的好处)。

The third picture shows feathers that have just such a specialisation: coiling reminiscent of that seen in the feathers of modern divers.

螺旋造型与现代潜鸟的羽毛相似。