diameter的双解释义是什么

1. 直径
2. 径，对径
3. 放大倍数，透镜放大的倍数，放大率
4. 横断面

1. the length of a straight line passing through the center of a circle and connecting two points on the circumference
2. a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)

1.直径;对径
Thediameter of a round object is the length of a straight line that can be drawn across it, passing through the middle of it.

diameter的解释

e.g. ...a tube less than a fifth of thediameter of a human hair.
直径不足人的头发直径1/5的电子管
e.g. ...a length of 22-mmdiameter steel pipe.
一段直径为 22 毫米的钢管

1. The circle has a diameter of 6 inches.
   这个圆直径六英寸。
2. This microscope magnifies 20 diameters.
   这台显微镜能放大20倍。

• The castor of a bed-leg, magnified to roughly 118 diameters.

  出自：F. O

• ☆ 14世纪晚期进入英语，直接源自拉丁语的diametros，意为穿过圆的长度。