“focal chord”的概念、定义、翻译、参考文献-科学参考

单词	focal chord
释义	focal chord [`fō·kǝl ¦kȯrd] ^MATHEMATICS For a conic, a chord that passes through a focus of the conic.
随便看	lightening hole lighter lighterage lighter-than-air craft light exposure light filter light float light fog light freeze light frost light-gating cathode-ray tube light guide light gun light homing light-hour lighthouse lighthouse tube light howitzer light hydrogen lighting branch circuit lighting-off torch light-inspection car light intensity light ion light list

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