abandon抛弃abaxial离轴的ablation烧蚀abnormal liquid异常液体abrasion磨耗abrasion hardness耐磨硬度abrasion test磨损试验abrasion tester磨损试验机abrasives研磨材料abrupt perturbation突然扰动abscissa横坐标absence of collision无碰撞absence of gravity失重absence of stress无应力absence of vortices无旋涡absolute绝对的absolute acceleration绝对加速度absolute angular momentum绝对角动量absolute ceiling绝对升限absolute coordinates绝对坐标absolute deviation绝对偏差absolute elastic body完全弹性体absolute equilibrium绝对平衡