| 单词 | diamond boron |
| 释义 | > as lemmasdiamond boron diamond boron n. an impure form of boron obtained in octahedral crystals nearly as hard and brilliant as the diamond. ΚΠ 1863 H. Watts Dict. Chem. I. 628 Adamantine or Diamond Boron,..extremely hard, always sufficiently so to scratch corundum with facility, and some crystals are nearly as hard as diamond itself. < as lemmas |
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