They created the first double helix model of DNA in 1953. Photograph: ap.

他们在1953年构建了第一个DNA双螺旋结构。

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Society/Environment: First double amputee qualifiesfor 400-meter Olympic sprint in London. Places fourth.

社会及环境：双截肢者首次获得参加伦敦奥运会短跑比赛资格，并获第四名。

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The first double word of every frame points to the next frame and this is immediately followed by the address of the calling function.

每一帧的第一个双字（double word）指向下一帧，这后面紧跟着调用函数的地址。

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The new loans are double what China pledged at the first Forum on China Africa Cooperation three years ago in Beijing.

VOA: standard.2009.11.08

So the question was-- First, it was the accusation before the question, that I'm holding a sort of double standard.

其问题是,首先,在这个问题之前他指责,我在施行双重标准

耶鲁公开课 - 死亡课程节选

The bill was passed, and within five months after the bill was passed, we had double digit unemployment for the first time.

法案顺利通过，法案通过后五个月，失业率就达到了两位数,是史上第一次。

斯坦福公开课 - 经济学课程节选

My firm sold its AOL after the first double from the stock's low last spring.

FORBES: Santayana got it wrong

His Kendall-Jackson Chardonnay won the first double Platinum Award ever presented by the American Wine Competition.

FORBES: Jess Jackson, Billionaire Winemaker, Dies At 81

He was the first double-amputee runner to compete against able-bodied athletes at the Olympics.

WSJ: South African Track Star Disputes Murder Charge