| 释义 |
caratBrE /ˈkærət/ NAmE /ˈkærət/ noun (abbreviation ct ) a unit for measuring the weight of diamonds and other precious stones , equal to 200 milligrams 克拉（钻石或其他宝石的重量单位，等于 200 毫克）(especiallyBrE ) (NAmE usuallykarat ) a unit for measuring how pure gold is . The purest gold is 24 carats 开（黄金成色单位，纯金为 24 开）◆ an 18 -carat gold ring 18 开的金戒指 |