单词	first derivative
释义	first derivative noun mathematics : the derivative of a function Word History First Known Use 1852, in the meaning defined above
随便看	preheater preheaters preheating preheats prehend prehended prehending prehends prehensible prehensile prehensilities prehensility prehension prehensions prehensive prehensorial prehensorial foot prehensors prehepaticus prehire prehiring prehistorian prehistorians prehistoric prehistoric archaeology

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