| 单词 | quadric surface |
| 释义 | quadric surface (once / 11819311 pages) n WORD FAMILY quadric surface USAGE EXAMPLESIf a line moves so that it always cuts three given lines of which no two meet, then it generates a ruled quadric surface. Various, Encyclopaedia Britannica, 11th Edit...(2011) ELLIPSOID, a quadric surface whose sections are ellipses. Various, Encyclopaedia Britannica, 11th Edit...(2011) The diameter of a quadric surface is a line at the extremities of which the tangent planes are parallel. Various, Encyclopaedia Britannica, 11th Edit...(2010) n a curve or surface whose equation (in Cartesian coordinates) is of the second degree Syn|Hypo|Hyper quadric hyperboloid a quadric surface generated by rotating a hyperbola around its main axis curve, curved shape the trace of a point whose direction of motion changes |
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