gyration [dʒaɪ'reɪʃn]

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n.旋转

a single complete turn (axial or orbital);

Prince continued his enthusiastic gyrations on stage. 王子继续在舞台上充满激情地旋转。
In this case, a charged particle has a simple gyration. 在这种情况下，带电粒子有一个简单的回转。