单词	echolocation
释义	echolocation /ˈɛkə(ʊ)lə(ʊ)ˌkeɪʃ(ə)n / noun [mass noun] The location of objects by reflected sound, in particular that used by animals such as dolphins and bats.Many odontocetes can navigate by echolocation, producing sound waves using a complex system of nasal sacs and passages, and using the echoes to navigate.... Like bats, dolphins use echolocation, an internal sonar system, to help them navigate, avoid predators and find food. The rivers used by most platanistids are muddy, and these animals probably rely on echolocation more than vision to locate their prey.
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