| 单词 | 极值 |
| 释义 | 〔average〕 Average and medium apply to what is midway between extremes on such a scale;usually they imply both sufficiency and lack of distinction: Average 和 medium 用于指某一程度两极值间的中部；通常它们均指充分性及不加区别性：〔speed〕The limit of this quotient as the time of travel becomes vanishingly small; the first derivative of distance with respect to time.瞬时速度：当运动时间小到可以忽略时，此商数的极值；距离相对于时间的一阶导函数 |
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