velocity sag

例句：

1. 1. Thecar's velocity sag is causingthe driver to lose control.
   汽车的速度下降导致驾驶员失去控制。
2. 2. The team'sperformance has seen a significant velocity sagin recent matches.
   该队近期的表现出现了显著的速度下降。
3. 3. The scientist observed that theobject's velocity sag was dueto its collision with another object.
   科学家观察到，该物体的速度下降是由于它与其他物体的碰撞造成的。