| 词汇 | diameter |
| 释义 | diam·eterBrE /daɪˈæmɪtə(r)/ NAmE /daɪˈæmɪtər/ noun a straight line going from one side of a circle or any other round object to the other side , passing through the centre 直径；对径◆ the diameter of a tree trunk 树干的直径◆ The dome is 42 .3 metres in diameter . 这个穹顶直径为 42.3 米。 ➡ compare radius (1 ) (specialist ) a measurement of the power of an instrument to magnifysth 放大率；放大倍数◆ a lens magnifying 300 diameters (= making sth look 300 times larger than it really is )放大 300 倍的透镜 |
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