point representing the mean position of the matter in a body
双语例句
The disadvantageous effect should be considered when the deflection between the structural mass center and stiffness center exists. 摘要结构刚度中心与质量中心偏差较大时，应考虑扭转的不利影响，将高层建筑结构等效为悬臂杆，从顶至底依次选取脱离体。
