| 单词 | 定点 |
| 释义 | 〔set〕To adjust (an instrument) to a specific point or calibration:校正：将（仪器）调整到某定点或刻度：〔perpendicular〕A device, such as a plumb line, used in marking the vertical from a given point.垂规，铅垂线：一种装置，如铅垂线，用于从给定点标记竖直方向〔derivative〕The slope of a graph of an equation at a given point. Also called differential coefficient ,fluxion 微商：方程曲线在某一给定点的斜率 也作 differential coefficient,fluxion |
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