单词 | 用于研磨 |
释义 | 〔diamond〕An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications.钻石:一种极其坚硬,高折射率的结晶形状的碳素,常常近于无色,被当作宝石并用于研磨、切割工具以及其它用途上 |
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