searchlight sonar

例句：

1. 1. The searchlight illuminated the dark night sky.
   探照灯照亮了黑暗的夜空。
2. 2. The police used a searchlight to guide them through the fog.
   警察用探照灯在雾中引导他们前进。
3. 3. The searchlight revealed the hidden treasure in the cave.
   探照灯揭示了洞穴中的隐藏宝藏。
4. 1.The submarine uses sonar to detect underwater objects.
   潜艇使用声纳来探测水下物体。
5. 2. The sonar system was designed to help fishermen locate their catches.
   声纳系统被设计用来帮助渔民定位他们的渔获。
6. 3.The sonar detected an underwater obstacle and informed the captain of the situation.
   声纳探测到了水下障碍物，并通知了船长情况。