| 单词 | diameter |
| 释义 | [/daɪˈæmɪtə(r); daɪˋæmətɚ/] n (length of a) straight line connecting the centre of a circle or sphere, or of the base of a cylinder, to two points on its sides 直径: the diameter of a tree-trunk 树干的直径 * a lens that magnifies 20 diameters, ie makes an object look 20 times longer, wider, etc than it is 放大20倍的透镜. =>App 5 见附录5. =>illus at circle 见circle之插图. |
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