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// 2. 通用场景: 快速排序（注意随机化避免最坏情况）
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Another way to approach the linear combination is to look at it geometrically. This is where the idea of barycentric coordinates can help. A barycentric coordinate system describes the location of a point as the weighted sum of the regular coordinates of the vertices forming a simplex. In other words, it describes a linear combination with respect to a set of points, where in -dimensional space.
"We have an expected behaviour pattern [for protests]," one police officer has told the BBC anonymously. "But with this new generation, we do not understand their social media or how they mobilise on the ground."