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n. 束；捆 | vt. 捆 | vi. 匆忙离开
n. [俚]流浪汉的铺盖卷；包裹
In mathematics, biquandles and biracks are generalizations of quandles and racks. Whereas the hinterland of quandles and racks is the theory of classical knots, that of the bi-versions, is the theory of virtual knots.
biquandle:
bi- +? quandle
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