小测验：选择正确的单词
carat ['kærət]
基本释义
参考例句
- This diamond weighs 270 carats.
这钻石重270克拉。
英英解释
- a unit of weight for precious stones = 200 mg
- the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold
[同]
karat, kt, carat
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