spatial and seasonal variation

• 变化特征

spatial and seasonal variation的用法和样例：

例句

1. The variation characteristics of shallow confined groundwater are similar with phreatic water.
   浅层承压水含水组的地下水质变化特征和潜水基本一致。
2. A preliminary analysis of causes for the spatial and temporal variation characteristics of SSC in the sea area is also made.
   对长江口外及邻近海域含沙量时空变化特征的原因进行了初步分析。