Cobalt is a hard silvery-white metal which is used to harden steel and for producing a blue dye.
例句
...a country rich in copper, cobalt and diamonds.銅、鈷和鉆石資源豐富的國家
COLOUR
鈷藍色;深藍色
Cobalt or cobalt blue is a deep blue colour.
例句
They walked past stalls selling huge sprays of crimson, saffron and cobalt flowers.他們經過很多賣花的攤位，攤位上擺著大把大把的鮮花，有深紅色的，有金黃色的，還有深藍色的。...a woman in a soft cobalt blue dress.穿著質地柔軟的鈷藍色連衣裙的女人
英英詞典釋義
Noun
1. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition