結果 : why are some electric toothbrushes more expensive than others

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12:36

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Should I buy an expensive toothbrush?

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6:09

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4:22

$1 Toothbrush vs $400 Toothbrush!

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15:51

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Why choose ISSA 2 over other electric toothbrushes?

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1:17

Consumer Reports Tests Electric Toothbrushes | Consumer Reports

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