例句與造句

1. Using the sonar charts and satellite-based navigational signals, the divers will be able to get to within a few feet of a suspected, but invisible, target.
2. Palowitch said he first thought about using the laser scanner at the crash site a week ago, after the initial sonar chart showed the wreckage was strewn over such a large area that divers and robots alone would take many weeks to make substantial progress inspecting targets.
3. It's difficult to find sonar chart in a sentence. 用sonar chart造句挺難的