youdao

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。

youdao

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。

youdao

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