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In fact, some film of the ninja is not only a buoyant board feet, the hands will be which of the two, the same as skiing, and four board also increased the stability of buoyancy, can you retest?
其实在一些电影中的忍者不仅脚上有浮力板，手上也会哪两个，像滑雪一样，而且四个浮力板也增大了稳定性，可不可以重新测？
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