短語詞組短語vertical center of gravity 垂直重心;垂向重心Fuzzy Center of Gravity 模糊重心population center of gravity 人口重心Center of Gravity Graphs 重心圖表center of gravity range 重心范圍high center of gravity 高重心synthetical center of gravity 綜合重心center of gravity shakes 重心動搖virtual center of gravity 虛重心 返回 center of gravity