Natural neighbour interpolation has a number of strengths over linear barycentric interpolation. Namely, it provides a smooth or continuous slope between samples3, and is always the same for a given point set, unlike the TIN where the quality of the triangulation can produce biases in the outcome, even in the best case.
return j; // 返回pivot的最终位置
，这一点在WPS官方版本下载中也有详细论述
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（二）在铁路、城市轨道交通线路上放置障碍物，或者故意向列车投掷物品的；