Ui 称为 节点 （knots）, 集合 u 称为 节点向量 （knot vector）, 半开区间 [ui, ui +1) 是第 i 个节点区间（knot span）。 注意某些 ui 可能相等，某些节点区间会不存在。 视频转自 measuring boat speed with actual knots (a chip log) 其中清晰可见，使用塑料制作的“圆木片”是半圆形，用三根绳索固定，并汇集到一根绳上。投入水中后圆木片由于. 【节】kts = knots per hour ，海里/小时。 是指地球子午线上纬度1分的长度，由于地球略呈椭球体状，不同纬度处的1分弧度略有差异。
Knots Landing Pictures Getty Images
[例句]they travel at speeds of up to 30.
'Knots Landing' Cast Looks Back on the Iconic Series 40 Years Later
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'Knots Landing' Cast Looks Back on the Iconic Series 40 Years Later
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'Knots Landing' Cast Looks Back on the Iconic Series 40 Years Later
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Knots Landing TV Series (19791993)
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Knots Landing Pictures Getty Images
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'Knots Landing' Ended 30 Years Ago What the Cast Did After Leaving the
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'Knots Landing' Ended 30 Years Ago What the Cast Did After Leaving the
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