cobalt

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

...a country rich in copper, cobalt, and diamonds. ...一個銅、鈷和鑽石資源豐富的國家。

2. COLOR Cobalt or cobalt blue is a deep blue colour. 鈷藍色

...a woman in a soft cobalt blue dress. ...一個穿著質地柔軟的鈷藍色連衣裙的女人。