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tone unitBrE/ˈtəʊn juːnɪt/🔊NAmE/ˈtoʊn juːnɪt/🔊 (also ˈtone group) noun (phonetics语音学) thebasicunitofintonation in a language which consists of one or more syllables with a complete pitchmovement语调单位(即有完整音高变化的一个或多个音节)