first moment

first moment

n. 一次矩, 算术平均值, 期望值

例句与用法：

For his first moments in this world, there was no breath, no cry from our little angel.

我们的小天使降临世界的最初时刻，没有呼吸，没有哭声。

The expected value of a positive integral power of a random variable. The first moment is the mean of the distribution.

矩，动差任意变量的正整数功效的期望值。第一个矩是分配的平均数