impactorn.冲击器(卧式锻造机；硬着陆宇宙飞船)impactn.影响；冲击力；撞击vt.挤入；压紧；撞击；对 ... 发生影响vi.冲击；撞击；产生影响impact resilience抗冲性impact attenuator碰撞衰减器impact load shape冲击载荷形状impact viscometer冲击粘度计impact mechanisms作用机制impact on economy经济影响impact and damage破环impacted feces.堵塞的排泄物impact broadening碰撞致宽impacting quality压实质量