correlation

The study found a strong positive correlation between daily exercise and mental well-being.

(Chinese) 研究发现，每天锻炼与心理健康之间存在强烈的正相关性。

A correlation between two events does not necessarily mean that one caused the other.

(Chinese) 两个事件之间的相关性并不一定意味着其中一个导致了另一个。