单词	echometer
释义	echometer noun echo·​me·​ter ˈekōˌmētə(r) plural -s : an apparatus for measuring depths of objects in water or underground by timing the echoes of sound reflected from them Word History Etymology echo entry 1 + -meter
随便看	portliness portlinesses portly portman portmanteau portmanteau word portmanteaus portmanteaux portmantle portmantologism portmantua portmen portmoot Portmore portmote Porto Porto Alegre Porto Rican porto rico Porto-Novo portobellas portobello portobellos Portobelo portocaval

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