fineness of gold

• 金成色

fineness of gold的用法和样例：

例句

1. 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。