The structure of the molecular sieves is studied by means of X-ray diffraction, XPS, EPMA and IR spectrometry, and the unit cell parameters are measured with step scanning technique.是什么意思_The structure of the molecular sieves is studied by means of X-ray diffraction, XPS, EPMA and IR spectrometry, and the unit cell parameters are measured with step scanning technique.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句