Using water or toluene as solvent, preasphaltene is the dominant fraction in the extract.H/C atom ratio in asphaltene and preasphaltene is higher with water than with toluene, but...是什么意思_Using water or toluene as solvent, preasphaltene is the dominant fraction in the extract.H/C atom ratio in asphaltene and preasphaltene is higher with water than with toluene, but...在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句