red gold的用法和樣例：
例句
- He gives her a necklace of proof gold.
他送給她一條純金的項鏈。 - "A sweet temper" is a figurative expression, but "sweet coffee" is not.
"甜蜜的性情"是個比喻的說法，而"甜咖啡"則不是。 - The monetary system of some countries used to be based on gold.
過去有些國家的貨幣制度是金本位制的。 - Centuries ago, gold coi were used as money because gold is inherently valuable.
幾個世紀以前，由於金幣本身具有價值而作為貨幣使用。
