cobalt

1. N-UNCOUNT Cobalt is a hard, silvery-white metal which is used to harden steel and for producing a blue dye. 钴

...a country rich in copper, cobalt, and diamonds. ...一个铜、钴和钻石资源丰富的国家。

2. COLOR Cobalt or cobalt blue is a deep blue colour. 钴蓝色

...a woman in a soft cobalt blue dress. ...一个穿着质地柔软的钴蓝色连衣裙的女人。