sonar

/ˈsoʊ.nɑːɹ/ 名词 C1

中文：声纳

Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses. (uncountable) · They were able to detect the sunken wreck using sonar.
A device that provides such echolocation. (countable) · They finally bought a new sonar to replace the 40-year-old unit that sometimes didn't work right.
Any echolocation. (countable, uncountable) · Submarines and bats both use sonar to navigate.

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