And, it is not just prosperous, urban centers where gold is selling. Demand is also high in rural areas where other investment options such as Banks and stocks are limited.

而且黄金不仅仅在繁荣的城市中心畅销，在其他诸如银行产品和股票投资有限的农村地区，黄金需求也居高不下。

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With servers been scattered in data centers worldwide and demand varying wildly due to news and blog coverage, product releases, and even the shopping season, a lot specialized knowledge is needed.

由于服务器分散在世界上不同的数据中心，以及因新闻、博客、产品发布、甚至购物季节等带来的巨大变化需求，我们需要很多专业的知识。

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As demand for rubber soared small dumpy river towns like Manaus, Brazil, were transformed into over night into bustling centers of commerce.

由于对橡胶的需求急速增长，象巴西马瑙斯那样的肮脏破旧的河畔小镇一夜之间就变成了热闹的商业中心。

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The growth of these industrial centers created a big demand for food, especially meat.

VOA: special.2010.03.18

Perhaps more importantly, this resource potential is a hop, skip and a jump away from the mega-demand centers along the coastal regions of the East Coast.

FORBES: Wind Lobby Eyes the Big Prize in North Carolina

The proximity of offshore wind in the the Atlantic Ocean to deep demand centers avoids the problems of moving power over long distances and significantly enhances the economic fundamentals of mega projects like those currently being considered in North Carolina.

FORBES: Wind Lobby Eyes the Big Prize in North Carolina

Like China, the prodigious expansion of power production from renewable-energy resources like wind, solar energy and geothermal has outpaced the ability of the transmission systems to move these new power supplies to centers of demand.

FORBES: Transmission Bottlenecks Bad News for Renewable Energy