general covariance

例句：

1. 1. Thedata shows a strong positive relationship between temperature and precipitation.
   数据显示温度和降水之间存在强烈的正相关关系。
2. 2. This study found that the general covariance between two variables is important for understanding their relationship.
   这项研究发现，两个变量之间的一般协方差对于理解它们之间的关系至关重要。
3. 3. In statistics, the concept of general covariance is used to describe how two variables are related to each other.
   在统计学中，一般协方差的概念被用来描述两个变量之间的关系。