The variation of relative molecular mass and its distribution in the process of SBR and PS (HIPS) were determined by gel permeation chromatograph (GPC).是什么意思_The variation of relative molecular mass and its distribution in the process of SBR and PS (HIPS) were determined by gel permeation chromatograph (GPC).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句