英英释义
Noun- the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold
例句
- A unit of measure for the fineness of gold, equal to 1/24 part. Pure gold is 24 karat; gold that is 50 percent pure is 12 karat.开测量黄金纯度的单位，等于24等分中的一分。纯金为24开; 50％纯度的黄金为12开。
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