cop·per·as英ˈkɒpərəs美ˈkɑpərəsAHDkŏpʹər-əsCOCA¹⁹⁷⁵³²BNC¹⁷³⁹⁹⁵⁺² 基本例句 n.绿矾¹⁰⁰ Copperas prepared by a reduction method of mechanically activated pyrite from pyrite cinder is featured by low cost, fast reaction speed and high quality. 以硫铁矿烧渣为原料，采用机械活化硫铁矿还原法制备绿矾具有成本低、反应快、产品质量高等优点。 cnki