二次曲面 (èrcìqūmiàn): quadric surface (geometry)

Meanings

1 quadric surface (geometry)
2 second-degree surface

Characters

二

Examples

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.

解析几何中常常研究二次曲面的方程。

Jiěxī jǐhé zhōng chángcháng yánjiū èrcìqūmiàn de fāngchéng.

Analytic geometry often studies the equations of quadric surfaces.

Tips

usage

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

Stroke Order

二 èr

次 cì

曲 qǔ

面 miàn

Related Words

二次元 èrcìyuán

the 2D world (anime, manga, games) / ACG subculture / otaku culture

老二 lǎoèr #5,630

second child / second eldest / the second one (in a family)

表面 biǎomiàn HSK 3 #3,321

surface; outside / appearance; on the surface

水面 shuǐmiàn HSK 7 #7,805

water surface / surface of the water

二级 èrjí #7,699

level two; second grade; Class II / secondary (in classification systems)

地面 dìmiàn HSK 4 #3,690

ground; floor; surface / ground level

再次 zàicì HSK 5 #1,076

once more / once again / for a second time

面 miàn #800

face / surface; side / noodles

第二 dìèr #527

second / number two (ordinal)

二等 èrděng #14,939

second class; second-rate