The CoMo/Al_2O_3 catalysts were prepared by impregnation (IM), dry mixing (DM) and wet mixing (WM) methods, and characterized by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and temperature-programmed sulfiding.是什么意思_The CoMo/Al_2O_3 catalysts were prepared by impregnation (IM), dry mixing (DM) and wet mixing (WM) methods, and characterized by X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy and temperature-programmed sulfiding.在线翻译_英语_读音_用法_例句