time reference scanning beam

例句：

1. 1. The time-reference scanning beam is used to measure the distance between two points on a surface.
   时间参考扫描束用于测量两个表面点之间的距离。
2. 2.In this experiment, we used a time-reference scanning beam to detect the movement of objects.
   在这个实验中，我们使用时间参考扫描束来检测物体的运动。
3. 3.The time-reference scanning beam was used to create a map of the underground tunnels.
   时间参考扫描束被用来绘制地下隧道的地图。