XL2 was purified by three steps including breaking cell wall,ammonium sulfate precipitation,and gel filtration chromatography(GFC).是什么意思_XL2 was purified by three steps including breaking cell wall,ammonium sulfate precipitation,and gel filtration chromatography(GFC).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句