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doubling (-over) test的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
名詞 doubling:
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increase by a factor of two
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raising the stakes in a card game by a factor of 2
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increase twofold
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hit a two-base hit
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bend over or curl up, usually with laughter or pain
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do double duty; serve two purposes or have two functions
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bridge: make a demand for (a card or suit)
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make or do or perform again
