单词：centre of mass
centre of mass的用法和样例：
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。
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