periodical change

The periodical change of physical fitness training process was realized through the mutual transform of fitness disorder and order.

体能训练过程中的周期性变化是通过体能无序和有序状态的相互转化实现的；

互联网摘选

The periodical change in the tidal condition, tidal current asymmetry, vegetation influence, and deposition combined with evolution discrepancy of the tidal flat caused the difference of variation intensity of sensitivity components of the core sediments which located at different ecologic zone.

周期性变化的潮动力作用、潮流不对称作用、植被以及潮滩不同部位淤积演化差异的影响造成了潮滩不同部位沉积物敏感组分粒度垂向变化的差异。

互联网摘选