diameter
意味: A straight line passing through the centre of a circle or sphere from one side to the other, or the length of such a line.
The diameter is exactly twice the radius and is the longest chord of a circle. It is a fundamental measurement in engineering, manufacturing, and everyday life for describing the size of circular objects such as pipes, wheels, and lenses. The word is also used figuratively in phrases like 'diametrically opposed' to mean completely opposite.
例文
- The diameter of the telescope's primary mirror is two metres. 望远镜主镜的直径为两米。El diámetro del espejo principal del telescopio es de dos metros.その望遠鏡の主鏡の直径は2メートルである。그 망원경의 주경 지름은 2미터이다.
- She calculated the diameter by doubling the radius of the circle. 她通过将半径加倍来计算圆的直径。Calculó el diámetro duplicando el radio del círculo.彼女は円の半径を2倍にして直径を計算した。그녀는 원의 반지름을 2배로 하여 지름을 계산했다.
- The old oak tree had a trunk diameter of nearly one and a half metres. 那棵老橡树的树干直径将近一米半。El viejo roble tenía un diámetro de tronco de casi un metro y medio.その古いオーク材の幹の直径はほぼ1.5メートルであった。그 오래된 참나무의 줄기 지름은 거의 1.5미터에 달했다.
発音
使い方ガイド
場面: academic, scientific, professional
トーン: neutral
起源と歴史
From Greek diametros (diagonal of a circle), from dia (across, through) and metron (measure). Entered English in the 14th century via Latin and Old French.
文化的背景
Era: Modern
Generation: All ages
Social background: Universal
このトピックの他の表現
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