Practicality assets and virtual assets are two main existing forms of the public assets. Taking public ownership as main body is the unity of practicality assets and virtual assets.
实物资产和虚拟资产是公有资产的两种主要存在形态。公有制为主体是以实物资产与虚拟资产相统一的公有资产为主体。
Lignitous coal, humic acid, fragments of plant remnants and asphalt are main forms of existing organic substances.
褐煤、腐殖酸、残余植物碎屑和地沥青等是现存有机质的主要类型。
Zinc sulfide and zinc oxide are two main mineral forms existing in zinc ores. The processing of zinc oxide ores is becoming more attractive due to the depletion of zinc sulfide ores.
锌矿主要分为硫化锌矿和氧化锌矿两类，由于硫化锌矿的日益枯竭，氧化锌矿的开发逐渐受到重视。
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