that fits a given set of data perfectly. More concretely, suppose we
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Looking for a new vacuum to make your floors sparkly clean? You truly can't go wrong with a Dyson, one of the best brands out there for vacuuming. And as of Feb. 27, the Dyson V8 cordless vacuum is on sale at Amazon with a hefty $190 discount.，详情可参考新收录的资料
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