Five series of supported WO3 catalysts, prepared by impregnation method, have been studied by LRS, UV-DRS,XRD, and TPR methods.是什么意思_Five series of supported WO3 catalysts, prepared by impregnation method, have been studied by LRS, UV-DRS,XRD, and TPR methods.在线翻译_英语_读音_用法_例句