For example, U. S. researchers reported last Monday that pregnant women who drink two or more cups of coffee a day have twice the risk of a miscarriage as those who avoid caffeine.

比如，美国研究者上周一报道孕妇一天喝2或多杯咖啡，其流产风险是不使用咖啡因的2倍。

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Nearly 60, 000 people attended last year's two-day festival.

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U.S. domestic oil production is surging, rising above 7 million barrels per day for the last two months of 2012, according to the U.S. Energy Information Administration.

FORBES: Fracking Sand MLP Crushes It With 10% Yield

The attack came on the last morning of a two-day visit by U.S. Secretary of Defense Robert Gates.

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