laser Doppler radar

例句：

1. 1.The laser Doppler radar system isused to detect the movement of objects inspace.
   激光多普勒雷达系统用于探测空间中物体的运动。
2. 2. Thelaser Doppler radarwas developed by NASA tomonitor weather conditions.
   NASA开发了激光多普勒雷达来监测天气条件。
3. 3. The laser Doppler radar helpedscientists to map the ocean currents.
   激光多普勒雷达帮助科学家绘制了海洋洋流图。