noun 下载 🔗分享 铬, 铬元素 A chemical element (symbol Cr) with an atomic number of 24: a steely-grey, lustrous, hard and brittle transition metal. Examples : ""The shiny, silver-colored trim on my old car is made of chromium, making it resistant to rust." " 我老车上那些闪亮的银色装饰条是铬做的,这使得它不易生锈。 element chemistry substance material science 与AI对话词汇游戏阅读练习