名词
中文翻译：协方差函数同义词
同义词：
['covariance function', 'covariance function', 'covariance function']
例句：
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1. In statistics, a co-sigma-function is used to describe the relationship between two variables.
在统计学中，协方差函数用于描述两个变量之间的关系。
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2. The co-sigma-function of a random variable can be used to calculate its expected value.
随机变量的协方差函数可以用来计算其期望值。
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3. The co-sigma-function of a dataset helps us understand the distribution of the data.
数据集的协方差函数有助于我们了解数据分布情况。