drift scanning

例句：

1. 1. The drift scanning technique is used to detect the movement of objects in space.
   漂移扫描技术用于探测物体在空间中的位置移动。
2. 2. Drift scanning can be used to study the behavior of particles in a fluid.
   漂移扫描可用于研究流体中粒子的行为。
3. 3. In drift scanning, the object is moved slowly across the surface of the liquid.
   在漂移扫描中，物体缓慢地穿过液体的表面。