For the 3-dimension geometric figures sampling, the first sampling-position was most likely located at the outline parts of the figures, and rarely at the center of gravity of the figures.
立体几何图形的取样策略研究中，被试的首视点落在轮廓部位的概率最大，落在重心的概率极小。
2
From the viewpoint of geometric matching, parts' outline similarity matching is the most important in the process.