red gold

• 纯金

red gold的用法和样例：

例句

1. He gives her a necklace of proof gold.
   他送给她一条纯金的项链。
2. "A sweet temper" is a figurative expression, but "sweet coffee" is not.
   "甜蜜的性情"是个比喻的说法，而"甜咖啡"则不是。
3. The monetary system of some countries used to be based on gold.
   过去有些国家的货币制度是金本位制的。
4. Centuries ago, gold coi were used as money because gold is inherently valuable.
   几个世纪以前，由于金币本身具有价值而作为货币使用。