我们需要确定变量并建立它们之间的关系，然后再确定这些关系是否成立。

我们需要确定变量并建立它们之间的关系，然后再确定这些关系是否成立。

Results (English) 1:

We need to determine the variables and establish the relationship between them, and then determine whether these relationships are established.

Results (English) 2:

We need to determine the variables and establish their relationships before we can determine whether they are true.

Results (English) 3:

We need to determine variables and establish relationships between them, and then determine whether these relationships hold.