velocity of migration

例句：

1. 1. The speed of the wind is a critical factor in determining the migration patterns of birds.
   风速是决定鸟类迁徙模式的关键因素。
2. 2. The study found that the rate of migration increased significantly during the winter months.
   研究发现，冬季迁徙率显著增加。
3. 3. The scientists used satellite data to calculate the velocity of the migration flow.
   科学家使用卫星数据计算了迁徙流的速度。