SONAR's Sentences and Contexts

Learn SONAR from sentences of classic books. The app collects 10,000 middle or hard words; input your word, you not only get its meaning and example, but also have sentences and their contexts from classic literatures.

 Sentences of sonar
Definition:
n. a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
Example:
The researchers were drilling into a methane gas hot spot in the Laptev Sea from their fishing boat and trying to measure how much gas was released with their sonar.
Sentence in Classic: