backwardadj.向后的；落后的adv.向后backward stop后退定程挡块backward flow逆流,反流backward ware逆波, 反向波backward jump向后跃步backward delay后向时延backward scale仰平衡backward dough发酵缓慢的面团backward bound回跳backward error[计] 后向误差, 反向错误backward lever逆手柄