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actinide series
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commencement
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circumvent
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active agent
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widow's weeds
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active subwoofer
active subwoofer /ˈæktɪv ˈsʌbˌwʊfər/
noun
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A subwoofer with a built-in amplifier.
(
active subwoofer
)
A subwoofer with a built-in amplifier.