This article extends the concept of regular precession of angular momentum vector to any mathematical and physical vector.
本文将力学中角动量矢量的规则进动的概念拓展到任意数学或物理矢量之上；
Vector field is important conception in science and engineering, which describes directional information of physical procedure and developing trends of states.
向量场是科学和工程中的重要概念，描述物理过程中的方向信息和状态的变化趋势。
This is the physical fundament of acoustic vector signal processing.
这是声矢量信号处理的物理基础。
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