| 释义 |
diam·eterBrE /daɪˈæmɪtə(r)/NAmE /daɪˈæmɪtər/ nouna 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 magnify sth 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 |
