The record they hope to claim is the greatest number of people simultaneously jumping rope at multiple venues in a 10-minute span.

他们想要打破的，是10分钟内在多个场所同时跳绳的最多人数纪录。

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Define the projected ratio (0.8), while the rope length has been fixed, smaller is projected ratio and more solid is the span. But the disadvantage is smaller the glide ratio.

确定投影比(0.8)，在绳索长度一定的情况下，投影比越小，展向刚性越好，但是同时滑翔比越小。

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Nautical A span of chain, wire, or rope that can be secured at both ends to an object and slung from its center point.

系船索：能被缚在一个物体两端，并从其中心点吊起的链子、缆绳，绳索的跨绳。

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