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1·The dome is 42.3 metres in diameter.

这个穹顶直径为42.3米。《牛津词典》

2·The axis of a circle is its diameter.

圆的对称中心线就是直径。《牛津词典》

3·It turns out that the diameter is actually 2.5 centimeters.

它的直径实际上是 2.5 厘米。

4·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。

5·On Mars, there are relatively few craters less than 5 kilometers in diameter.

在火星上，直径小于5公里的陨石坑相对较少。

6·The crater, now deeply buried in sediment, was originally about 200 kilometers in diameter.

这个陨石坑现在深埋在沉积物中，最初直径约200公里。

7·The negatively charged region is large: several hundred meters thick and several kilometers in diameter.

带负电荷的区域非常大：数百米厚，直径达几千米。

8·Nanocrystals, also known as quantum dots, are semiconducting particles with a diameter of a few millionths of a millimeter.

纳米晶体，也被称为量子点，是一种直径只有百万分之一毫米的半导体粒子。

9·It is mainly composed of a steel rectangular parallelepiped and two steel cylinders of the same diameter fixed at its two ends.

它主要由一钢制长方体和固定在其两端的两个相同直径的钢制圆柱体组成。

10·Atlas, the flatter of the two, has a diameter of only 18 kilometers from pole to pole but is almost 40 kilometers across its waist.

阿特拉斯是两者中较平整的一个，极点间的直径只有18公里，但它的赤道周长却有40公里。

直径

1·The axis of a circle is its diameter.

圆的对称中心线就是直径。《牛津词典》

2·It turns out that the diameter is actually 2.5 centimeters.

它的直径实际上是 2.5 厘米。

3·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。

4·Nanocrystals, also known as quantum dots, are semiconducting particles with a diameter of a few millionths of a millimeter.

纳米晶体，也被称为量子点，是一种直径只有百万分之一毫米的半导体粒子。

5·It is mainly composed of a steel rectangular parallelepiped and two steel cylinders of the same diameter fixed at its two ends.

它主要由一钢制长方体和固定在其两端的两个相同直径的钢制圆柱体组成。

径

1·The pebble has about a one millimetre microsphere diameter. The coolant is in fact helium.

卵石大约有1毫米的球径，冷却剂就是氦气。

2·Business by inquiring for the diameter, work with security.

业务由勤学为径，工作有安全做舟。

3·Businesss by inquiring for the diameter, work with security.

业务由勤学为径，工作有安全做舟。

4·Take the pipe made of stainless steel, including stainless steel elbow, stainless steel three, stainless steel four, stainless steel different diameter pipe, stainless steel pipe cap.

采取不锈钢材质制成的管件，包括不锈钢弯头，不锈钢三通，不锈钢四通，不锈钢异径管，不锈钢管帽等。

5·The structure and measuring principle of gradient furnace were introduced, and the curve of the foam temperature and bubble diameter was drawn.

介绍了梯温炉的结构及原理，根据测量结果绘制了发泡温度与泡径的关系曲线。

通径

1·The diameter (opening position , outer painting) of this branch pipe is not correct. It must be fabricated in accordance with the drawing.

这一支管通径（开的位置，外部涂装）不对，一定要按照图纸施工。

2·The original design of valve plate to open the gas valve is hanging in the channel, the possession of an effective diameter about 20%.

而原设计阀板打开是悬于阀体的气体通道内，占有有效通径20%左右。

3·The diameter of this pipe is 1500mm.

这根管子的通径是1500mm。

(1)particle diameter粒径；颗粒直径，粒子直径

(1)pipe diameter管直径

(1)inner diameter内径

(1)hole diameter孔直径；刃口直径

(1)pore diameter孔径；孔隙直径

(1)outside diameter外直径