| 单词 | corundum |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔amethyst〕A purple variety of corundum used as a gemstone.紫蓝色宝石：一种紫色刚玉，用作宝石美国传统〔diaspore〕A white, pearly hydrous aluminum oxide, AlO(OH), found in bauxite, corundum, and dolomite and used as a refractory and abrasive.硬水铝石，硬水铝矿：一种白色具珍珠光泽的含水氧化铝，AIO（OH），可在铝土矿、刚玉和白云石中找到，用作耐火材料和磨蚀剂美国传统〔emery〕A fine-grained impure corundum used for grinding and polishing.刚玉粉，金刚砂：用于磨粉和打光的一种细磨的不纯的刚玉粉美国传统〔oriental〕Relating to or designating corundum that resembles another stone in color.刚玉的：关于或表示在颜色上类似另一块石头的刚玉的美国传统〔ruby〕A deep red, translucent variety of the mineral corundum, highly valued as a precious stone.红宝石：深红色、半透明刚玉矿产，因是珍稀宝石价值很高美国传统〔sapphire〕A corundum gem.一种钢玉宝石美国传统〔sapphire〕A clear, hard variety of corundum used as a gemstone that is usually blue but may be any color except red.蓝宝石：一种透明的坚硬钢玉，用作宝石，通常为蓝色，但也可能是除红色以外其它任何颜色美国传统〔topaz〕Any of various yellow gemstones, especially a yellow variety of sapphire or corundum.黄宝石：一种黄色的宝石，特别是黄色的刚玉宝石美国传统 |
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