a system for the detection of objects under water by emitting sound pulses and detecting or measuring their return after being reflected
声呐。
[count noun]an apparatus used in this system
声波定位仪。
the method of echolocation used in air or water by animals such as whales and bats
声呐定位法。
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sonarn.声呐;声波定位仪;声呐定位法
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solaradj.太阳的;与太阳有关的;由太阳决定的;太阳能的
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