Last fall I joined an American Internet company to help them set up shop in China.

去年秋天，我加入了美国一家网络公司，帮他们在中国成立分部。

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But then, in theory American house prices never fall.

但当时美国的房价在理论上是不可能下跌的。

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The naive belief that American house prices could not fall at the national level has been exposed by the current crisis.

有关美国房市价格不可能全面下跌的天真信念已被当下的危机无情打碎。

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The stock market crash marked the beginning of the Great Depression -- a long,slow,painful fall to the worst economic crisis in American history.

VOA: special.2011.02.17

He will be a senior at American University in the fall.

VOA: special.2010.06.18

American Nick Symmonds won his 800-m semifinal heat, despite having three runners in front of him trip and fall down.

VOA: standard.2009.08.22

When American businesses fall to more efficient foreign competitors, workers temporarily suffer, but domestic companies refocus where they excel.

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Put premiums may appreciate should implied volatility edge higher and shares in the parent company of American Airlines fall further as the story continues to play out.

FORBES: AMR Put Options Fly As Stock Loses 33%, Bulls Bet On Las Vegas Sands

Other automotive firms to be hit by the downturn include Germany's Daimler, which has seen North American sales fall, while Italy's Fiat said sales could drop 20% in 2009.

BBC: Peugeot to launch 'massive' cuts