variation vector field

例句：

1. 1. The study ofthe variational vector field is crucial forunderstanding the dynamics of fluids.
   研究变异向量场对于理解流体动力学至关重要。
2. 2. In thispaper, we introduce a new method tocalculate the variational vector field in three-dimensional space.
   在本文中，我们介绍了一种计算三维空间中变异向量场的新方法。
3. 3. The variational vector field hasbeen widely used in various fields such asfluid dynamics and electromagnetic theory.
   变异向量场在流体动力学和电磁理论等多个领域得到了广泛应用。