Changes in color and carbon groups of gum rosin under heat were investigated by CIE system L *a *b * and X ray photoelectron spectroscopy(XPS).是什么意思_Changes in color and carbon groups of gum rosin under heat were investigated by CIE system L *a *b * and X ray photoelectron spectroscopy(XPS).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句