circumference
Meaning: The distance around the edge of a circle or any closed curved shape.
Circumference is calculated by the formula C = 2πr or C = πd, where r is the radius and d is the diameter. Beyond strict geometry, the word is used to describe the boundary or outer edge of any roughly circular area, such as the circumference of the Earth. It collocates naturally with 'measure,' 'calculate,' and 'around.'
Examples
- The circumference of the Earth at the equator is approximately 40,075 kilometres. 赤道处地球的周长约为40,075公里。La circunferencia de la Tierra en el ecuador es de aproximadamente 40 075 kilómetros.赤道における地球の周長は約40,075キロメートルである。적도에서의 지구 둘레는 약 40,075킬로미터이다.
- She measured the circumference of the pipe to determine the correct fitting size. 她测量了管道的周长以确定正确的接头尺寸。Midió la circunferencia de la tubería para determinar el tamaño correcto del racor.彼女は正しい継手サイズを決めるためにパイプの周囲を測定した。그녀는 올바른 피팅 크기를 결정하기 위해 파이프의 둘레를 측정했다.
- The running track followed the circumference of the oval playing field. 跑道沿着椭圆形运动场的周边延伸。La pista de atletismo seguía la circunferencia del campo de juego ovalado.ランニングトラックは楕円形の競技場の周囲に沿っていた。육상 트랙은 타원형 경기장의 둘레를 따라 이어져 있었다.
Pronunciation
Usage Guide
Context: academic, scientific, professional
Tone: neutral
Origin & History
From Latin circumferentia, from circumferre (to carry around), composed of circum (around) and ferre (to carry). Entered English in the 14th century via Old French.
Cultural Context
Era: Modern
Generation: All ages
Social background: Universal
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