研究发现睡眠质量与压力水平密切相关。

Research shows that sleep quality ___correlates with stress levels.

研究表明睡眠时间与工作效率存在相关性。

Studies show that sleep duration ___correlates with work efficiency.

研究人员试图将这些数据与过去的实验结果联系起来。

The researchers tried to ___correlate this data with previous experiment results.