Du Toit's effort in the open water swimming marathon left you in tears.

杜托伊特在户外游泳马拉松中所付出的努力让人落泪。

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Marathon, US: a dolphin at the dolphin Research Centre waits to be fed fish while swimming in a pen, as he acclimates to his new surroundings after being found.

美国，马拉松：一个海豚研究中心的海豚在池子里游泳的时候等待喂食，他已经适应了这儿的新环境。

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There are no flip turns to negotiate in marathon swimming, which is usually held in lakes and oceans, and the upper body is more important than the legs.

这种马拉松式游泳一般在湖泊或海洋中进行，不需要突然发力和转身，而且上半身的动作比腿部更关键。

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Gold in the men's open water 10-kilometer swimming marathon in the Serpentine, the lake in London's Hyde Park, went to Tunisian Oussama Mellouli.

CNN: August 10, 2012 -- Updated 2336 GMT (0736 HKT)

And experts predict that women could soon outperform men in long-distance swimming and the marathon.

ECONOMIST: A story as old as girl meets boy

Marathon swimming is so new that it's hard to obtain data on splits or compile any convincing evidence about strategy.

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