二次曲面

èrcìqūmiàn
noun

Meanings

  1. 1 quadric surface (geometry)
  2. 2 second-degree surface

Examples

HSK 7-9
椭球、双曲面和抛物面都是二次曲面。
Tuǒqiú, shuāngqūmiàn hé pāowùmiàn dōu shì èrcìqūmiàn.
Ellipsoids, hyperboloids, and paraboloids are all quadric surfaces.
HSK 7-9
Jiěxī jǐhé zhōng chángcháng yánjiū èrcìqūmiàn de fāngchéng.
Analytic geometry often studies the equations of quadric surfaces.

Tips

usage
Mathematical term: 二次 ('second-degree') + 曲面 ('curved surface'). The 3D analogue of 二次曲线 ('conic section').

Stroke Order

二 èr
次 cì
曲 qǔ
面 miàn