| 单词 | directrix |
| 释义 | directrix 1 A plane curve defining the base of a cone. 2 A straight line from which the distance to any point on a conic is in a constant ratio to the distance from that point to the focus. |
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。