surface association

例句：

1. 1.The researchers found a surface association between the two variables.
   研究人员发现这两个变量之间存在表面关联。
2. 2.This theory suggests that there is a surface association between genetics and behavior.
   这个理论表明遗传学和行为之间存在表面关联。
3. 3.The study revealed a surface association between stress and depression.
   研究发现压力与抑郁之间存在表面关联。