blue powder的用法和樣例：
例句
- The microstructures of Cu-Zn powder under different annealing conditions were studied.
研究了銅鋅粉末在不同退火工藝下的顯微組織變化。 - In this paper the preparation method of surperpurity europium oxide by zinc powder reduction extraction chromatography is expouned.
簡(jiǎn)述了采用鋅粉還原萃取色層法制取超高純氧化銪的工藝過(guò)程。
