Double the tax, and gas would remain competitive with nuclear and wind power, too, says Exxon Mobil.

把税提高一倍，天然气就能和核能和风能竞争，埃克森美孚称。

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Competitive sumo wrestlers are recruited as young men and undergo a decade of training during which time they as much as double their normal, already stocky weights from 200 to 400 pounds.

竞技相扑选手在年轻时被选中并开始进行十余年的训练，期间他们的体重至少要从原来正常的200磅增加到400磅，几乎是多了一倍。

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That gives them a double-edged competitive advantage; everyone else has to spend extra time and money supporting that format, and no one else's support will ever be as good.

这样将使它们具备双重竞争优势；所有人都必须花费额外的时间和金钱支持这种格式，并且任何人的支持都不会是最好的。

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The double strike killed off the match as a competitive spectacle, although Jermaine Pennant flashed in a couple of long-range free-kicks to give Birmingham some hope.

BBC: Marlon Harewood celebrates his opening goal

Today's Sony PS3 unveiling has opened up a world of questions regarding how Microsoft expects to maintain a competitive edge against a system that will supposedly have more than double the raw processing power, a next-gen media drive (Blu-ray, in this case), two-generation backwards compatibility, and even support for 1080p hi-def.

ENGADGET: & Joystiq's live coverage of Microsoft's Xbox 360 E3 event

In what is now a very competitive marketplace, Dr. Ferrari plans within the next five to seven years to double the size of the school's full-time M.

WSJ: Big Test at Johns Hopkins