precious metal powder

例句：

1. 1.The gold and silver in the precious metal powder are very valuable.
   珍贵金属粉末中的黄金和白银非常宝贵。
2. 2. This rare metal powder is used in electronic devices for its unique properties.
   这种稀有金属粉末因其独特的性质被用于电子设备中。
3. 3. The ancient Chinese emperors valued this precious metal powder highly for its rarity and beauty.
   古代中国皇帝非常珍视这种珍贵金属粉末，因为它的稀有性和美丽。