| 单词 | hyperbola |
| 释义 | Word Frequency hyperbola(haɪˈpɜːbələ) nounWord forms: plural -las or -lae (-ˌliː) a conic section formed by a plane that cuts both bases of a cone; it consists of two branches asymptotic to two intersecting fixed lines and has two foci. Standard equation: x2/a2 – y2/ b2 = 1 where 2a is the distance between the two intersections with the x-axis and b = a√(e2 – 1), where e is the eccentricity Word origin C17: from Greek huperbolē, literally: excess, extravagance, from hyper- + ballein to throw |
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