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代詞 differential:
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the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx
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a quality that differentiates between similar things
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a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves
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上面內部獨門寫作，受視頻的權庇護，侵犯著作權必究
海詞漢語詞典，十二年高端品牌
美
[d?f?'ren?lz]