triple (course) surface treatment
英
美
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名词 triple:
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a base hit at which the batter stops safely at third base
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a set of three similar things considered as a unit
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a quantity that is three times as great as another
动词 triple:
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increase threefold
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hit a three-base hit
形容词 triple:
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having three units or components or elements
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three times as great or many