cyclic variation

• 周期性变化

cyclic variation的用法和样例：

例句

1. Variations in the properties of the weld occurring at short regular intervals along the weld line due to repetitive variation in welding heat.
   由于焊接热量周期变化，使得沿焊缝线每一固定的小间距焊缝的性能出现周期性变化。