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bel

noun
🔊/bel/
🔊/bel/
(specialist)
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  1. a measurement of sound equal to 10 decibels贝尔，贝（声音计量单位，等于 10 分贝）
    Word Origin1920s: from the name of A. G. Bell (1847-1922), who invented the telephone and the gramophone.