LI Q.WANG L-S.HU B-Y.YANG C ZHOU L ZHANG L Preparation and characterization of NiO nanoparticles through calcination of malate gel 2007(8-9是什么意思_LI Q.WANG L-S.HU B-Y.YANG C ZHOU L ZHANG L Preparation and characterization of NiO nanoparticles through calcination of malate gel 2007(8-9在线翻译_英语_读音_用法_例句