重复运算 meaning in Chinese

repetitive operation

The low efficency arise from two factors : one is that we do n ' t understand multibody system as deep as possible , resting on " there are so many trees as one ca n ' t see the forest " . the other is that the algorism should hardly avoids void computing possiblly - - adding , minusing or multipling by zero , and ca n ' t reach the precision computing - - each computing is necessary , and the latter computing use the formal results as it can as as possible
计算效率不高的原因有二、一是对机械多体系统认识深刻程度不够，停留在“只见树木，不见森林”的层次上；二是算法上应该竭力避免虚运算? ?与零相加减、与零相乘和重复运算等，但由于多体系统动力学的复杂性、强非线性和人们对其认识现有深度的不够，故未能实现所谓的“精益运算” ? ?每步运算皆为必须，且后续运算应尽能借用已有结果。