Swimming upright, it navigates by moving two body-length rows of thin, paddle-shaped protrusions that cascade like dominoes.

竖直游时，它用两排和身体长度相当或更长的纤细的桨状突起来控制方向和移动，两排突起的形状就像是两串多米诺骨牌。

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When the case is moving, the second leakage on the tip of splitter happens more easier, but the flow on the cascade tip is improved.

存在壁面移动时，二次泄漏更容易发生，但间隙流动得到改善；

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When the cosmic rays and gamma rays smash into molecules in the Earth's atmosphere, they set off a cascade of other fast-moving particles.

BBC: Hawc gamma-ray telescope captures its first image