| Front | cobalt |
|---|---|
| Back | / ˈkəubɔːlt; NAmE ˈkou- / ◙ noun [U] 1. (symb Co) a chemical element. Cobalt is a hard silver-white metal, often mixed with other metals and used to give a deep blue-green colour to glass. • 钴 2. (also ˌcobalt 'blue) a deep blue-green colour • 深蓝色；钴蓝 |
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