名词
中文翻译：金属
同义词：
['metal', 'precious metal例句：1. The gold standard is used as a measure of value in the economy.（黄金标准被用作衡量经济价值的一种方法。）']
例句：
-
1. The gold standard is used as a measure of value in the economy.
黄金标准被用作衡量经济价值的一种方法。
-
2.He was rich because he owned several pieces of protium.
他富有是因为他有好几件贵金属。
-
3. The ancient civilizations relied heavily on protium for their trade and commerce.
古代文明依赖贵金属进行贸易和商业活动。