longitudinal variation

• 纵向变动； 纵向变化

longitudinal variation的用法和样例：

例句

1. This change is similar to the longitudinal change of sediment thickness in the gully with dams.
   沟道土壤有机质的这种纵向变化规律与沙棘植物柔性坝拦沙淤积厚度纵向变化规律相同。