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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The double helix-type hollow fiber film device of the utility model has the advantages of high mass transferring efficiency, large feed liquid handling capacity and simple preparation and the like.

本实用新型设计的双螺旋式中空纤维膜器，具有传质效率高，处理料液量大，制备简单等优点。

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The utility model comprises a double helix filament body and filament pins integrally arranged on both ends of the filament body, the filament pins are respectively straight line filament pins.

本实用新型包括双螺旋灯丝主体和连体设置在主体两端的丝脚，所述两端的丝脚分别为直线型丝脚。

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Her image of a double helix provided the crucial evidence James Watson and Francis Crick needed to complete their model, but neither scientist acknowledged her work when they received the Nobel Prize in 1962.

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This is demonstrated in the exhibition's giant model of a City Hall Tower for Philadelphia that was never built, a dramatic double helix derived from the discovery of DNA in 1953.

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