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四维

四維
sìwéi
noun

Meanings

  1. 1 four-dimensional; 4D
  2. 2 the four social bonds: propriety, righteousness, integrity and a sense of shame

Examples

HSK 5
人很难想象四维空间是什么样子。
Rén hěn nán xiǎngxiàng sìwéi kōngjiān shì shénme yàngzi.
It's hard to picture what four-dimensional space looks like.
HSK 7-9
在相对论里，时间和空间合在一起，构成四维时空。
Zài xiāngduìlùn lǐ, shíjiān hé kōngjiān hé zài yìqǐ, gòuchéng sìwéi shíkōng.
In relativity, time and space combine to form four-dimensional spacetime.
HSK 7-9
管仲把礼义廉耻看作支撑国家的四维。
Guǎn Zhòng bǎ lǐyì-liánchǐ kànzuò zhīchēng guójiā de sìwéi.
Guan Zhong saw propriety, righteousness, integrity and a sense of shame as the four bonds that hold up the state.

Tips

usage
In maths and physics 维 means "dimension": 二维 2D, 三维 3D, 四维 4D. Everyday speech often just says 4D, as in a 4D cinema.
history
The moral sense comes from the 《管子》, which likens propriety, righteousness, integrity and a sense of shame (礼义廉耻) to four ropes holding up the state: cut one and it tilts, cut all four and it is destroyed. The Nationalist government promoted them in its New Life Movement of the 1930s, and schools in Taiwan still teach the 四维 with the 八德, the eight virtues.

Stroke Order

四 sì
维 wéi