The Saturn hexagon seems to represent the strange rigid path of a jet stream, with each of the six sides being one Earth diameter in length.

土星上的六角形云团像是激流形成的固定图案，每条边的长度与地球的直径相当。

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The microscope can magnify the object 100 times in diameter.

这架显微镜能把物体的直径放大100倍。

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The dome is 42.3 metres in diameter.

这个穹顶直径为42.3米。

《牛津词典》

The capsule is very narrow, about fifty-three centimeters in diameter.

VOA: special.2011.08.12

They might be 100 nanometers or so in diameter, whereas, a cell is ten microns or so in diameter.

直径只有一百纳米左右,而一个细胞的直径是十微米左右

耶鲁公开课 - 生物医学工程探索课程节选

Bacterial cells are small, one to two microns in diameter and this shows a picture of a common bacterium called E. Coli.

细菌细胞很小,直径只有一到两个微米,这张图片是一种常见细菌,大肠杆菌

耶鲁公开课 - 生物医学工程探索课程节选

Toshiba had created a hard drive that measured 1.8 inches in diameter in the late 90s.

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The "Tunguska Event" that flattened over 800 square miles of Siberian forest in 1908 was caused by a stony asteroid only 50 meters in diameter exploding in the lower atmosphere.

CNN: Space's threat to civilization

The heat exchangers and pipework required to make a 10MW plant already exist, but the 100MW facility will need a pipe that is not only 1km long (in order to reach the cold water at depth) but ten metres in diameter (in order to bring enough of that cold water to the surface).

ECONOMIST: Ocean heat may be used to generate electricity