nonsingular correspondence

例句：

1. 1. Theresearchers found that the nonsingular correspondencebetween the two variables was significant.
   研究人员发现两个变量之间的非奇异对应关系是显著的。
2. 2. In this study, we investigatedthe nonsingular correspondence between the ageand academic performance of students.
   在这项研究中，我们调查了学生年龄与学术表现之间的非奇异对应关系。
3. 3. The resultsof this analysis suggest that there is anonsingular correspondence between the amount ofsleep and cognitive function.
   这项分析的结果表明，睡眠量与认知功能之间存在非奇异对应关系。