By Caroline Hepker, BBC News, New York

媒體英語會帶大家一起學習BBC撰稿人在報道世界大事時常用到的單詞和短語。

Background: 2011年福布斯富豪榜公布上榜名單，世界上有1210 名身家超過10億美元的富翁上榜。這一數字比去年增加了214人。越來越多的來自亞洲等發展中國家的富豪登上榜單。

Forbes has been tracking the world's billionaires since 1987 and this year there are more mega-wealthy individuals than ever before.

The world's richest man is still Carlos Slim, the Mexican telecoms tycoon is worth $74 billion. The US has Microsoft's Bill Gates and investor Warren Buffett plus six Facebook billionaires, 413 American billionaires in all. But fast growing rivals are challenging US dominance.

Asia now has 332 billionaires, even more than in Europe. One hundred and fifteen billionaires are in China, many created as Chinese companies have listed on the stock market. And Moscow is the city with the most billionaire residents.

Commodities like steel and oil have soared in price creating fortunes this year, the authors of the survey warn they may not last.